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testo 440 dP - Air velocity and IAQ measuring instrument including differential pressure sensor
 

0560 4402
Volume flow measurement in ducts with the air velocity and IAQ measuring instrument testo 440
Volume flow measurement at outlets with the air velocity and IAQ measuring instrument testo 440
Measuring indoor air quality and comfort level using the air velocity and iaq measuring instrument testo 440
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  • Built-in differential pressure sensor – enables Pitot tube and filter measurements without additional equipment
  • Wireless flexibility – using Bluetooth® probes for hassle-free measurements up to 20 m away.
  • Intuitive operation – with structured menus for volume flow, comfort level, and long-term monitoring.
  • Versatile probe compatibility – with simultaneous support for Bluetooth, cable, and thermocouple probes
  • USB data export – for easy reporting and analysis of up to 7500 stored measurements.
    • Precise, reliable measurement of all air velocity and IAQ parameters with the testo 440 dP: the multifunction measuring instrument features an integrated differential pressure sensor and intuitive operation with clearly structured measurement menus. Adjusting air conditioning and ventilation systems, monitoring air quality or carrying out comfort level measurements – thanks to versatile options for combining with high-quality, digital probes, you are ideally equipped to carry out your measuring task (please order probes separately).
    • not available
    The testo 440 dP is a versatile and high-precision instrument that combines the functions of air velocity and indoor air quality (IAQ) measurement with an integrated differential pressure sensor. This enables professionals to perform tasks such as Pitot tube measurements, filter checks, and volume flow calculations using differential pressure and K-factors—all with one compact device.

    With support for up to three probe connections simultaneously (Bluetooth®, wired, and type K thermocouple), the testo 440 dP ensures efficient and flexible measurement across various HVAC applications. Its intuitive menu structure supports standard-compliant measurements for turbulence, thermal comfort, long-term monitoring, and airflow, while its wireless capabilities reduce cable clutter on-site.

    The device can store up to 7500 measurement reports, which can be exported via USB in CSV format for further analysis or documentation. Whether used for duct measurements, comfort studies, cleanroom monitoring, or IAQ assessments, the testo 440 dP is engineered for accuracy, ease of use, and operational efficiency in demanding environments.

    testo 440 dP air velocity and IAQ measuring instrument including integrated differential pressure sensor, connection hose, 3 x AA batteries, USB cable and calibration protocol.
     

    Temperature - NTC

    Measuring range
    -40 to +150 °C
    Accuracy
    ±0.4 °C (-40 to -25.1 °C)
    ±0.4 °C (+75 to +99.9 °C)
    ±0.5 % of mv (Remaining Range)
    ±0.3 °C (-25 to +74.9 °C)
    Resolution
    0.1 °C

    Temperature - TC Type K (NiCr-Ni)

    Measuring range
    -200 to +1370 °C
    Accuracy
    ±(0.3 °C + 0.3 % of mv)
    Resolution
    0.1 °C

    Differential pressure (internal sensor) - Piezoresistive

    Measuring range
    -150 to +150 hPa
    Accuracy
    ±0.05 hPa (0 to 1.00 hPa)
    (1.01 to +150 hPa)
    ±0.2 hPa + 1.5 % of mv
    Resolution
    0.01 hPa

    Comfort probes

  • Comfort probes
    Turbulence probe (digital), wired
    Turbulence probe (digital), wired: for determining the degree of turbulence and draught risk according to EN ISO 7730 / ASHRAE 55 – measuring range 0 to +5 m/s, 0 to +50 °C
      :
      0628 0152
      £ 902.00 £ 1,082.40
      1
    • Comfort probes
      Lux probe (digital) for measuring illuminance, wired
      Lux probe (digital), wired: for measuring illuminance in workplaces (e.g. offices, production areas) – measuring range 0 to 100,000 lux
        :
        0635 0551
        £ 355.00 £ 426.00
        1
      • Comfort probes
        CO2 probe (digital) with Bluetooth® including temperature and humidity sensor
        COâ‚‚ probe (digital) with Bluetooth® including temperature and humidity sensor: for measuring the indoor air quality in offices, production areas or storage facilities – measuring range 0 to 10,000 ppm, -10 to +50 °C, 5 to 95% RH
          :
          0632 1551
          £ 525.00 £ 630.00
          1
        • Comfort probes
          CO2 probe (digital) including temperature and humidity sensor, wired
          CO₂ probe (digital) including temperature and humidity sensor, wired: for measuring the indoor air quality in offices, production areas or storage facilities – measuring range 0 to 10,000 ppm, -10 to +50 °C, 5 to 95% RH
            :
            0632 1552
            £ 455.00 £ 546.00
            1
          • Comfort probes
            CO2 probe head including temperature and humidity sensor
            COâ‚‚ probe head including temperature and humidity sensor: for attachment to universal Bluetooth® or cable handle – measuring range 0 to 10,000 ppm, -10 to +50 °C, 5 to 95% RH
              :
              0632 1550
              £ 415.00 £ 498.00
              1
            • Comfort probes
              CO probe (digital) with Bluetooth®
              CO probe (digital) with Bluetooth®: for measuring carbon monoxide in indoor areas (e.g. boiler rooms) – measuring range 0 to 500 ppm
                :
                0632 1271
                £ 370.00 £ 444.00
                1
              • Comfort probes
                CO probe (digital), wired
                CO probe (digital), wired: for measuring carbon monoxide in indoor areas (e.g. boiler rooms) – measuring range 0 to 500 ppm
                  :
                  0632 1272
                  £ 329.00 £ 394.80
                  1
                • Comfort probes
                  CO probe head
                  CO probe head: for attachment to universal Bluetooth® or cable handle – measuring range 0 to 500 ppm
                    :
                    0632 1270
                    £ 276.00 £ 331.20
                    1
                  • Comfort probes
                    Globe probe Ø 150mm
                    Globe thermometer (TC type K) for the measurement of radiant heat – measuring range 0 to + 120 °C
                      :
                      0602 0743
                      £ 510.00 £ 612.00
                      1

                      • Food probes

                    • Food probes
                      Waterproof stainless steel food probe (NTC) - measuring range -50 to +150 °C
                        :
                        0615 3311
                        £ 133.00 £ 159.60
                        1
                      • Food probes
                        Frozen food probe (NTC) for screw-in use without pre-drilling - measuring range -50 to +140 °C
                          :
                          0615 3211
                          £ 163.00 £ 195.60
                          1
                        • Food probes
                          Robust food penetration probe (NTC) - measuring range -25 to +150 °C
                            :
                            0615 2411
                            £ 102.00 £ 122.40
                            1
                          • Food probes
                            Stainless steel food probe (NTC) - measuring range: -50 to +150 °C
                              :
                              0615 2211
                              £ 113.00 £ 135.60
                              1

                              • Humidity probes

                            • Humidity probes
                              Humidity/temperature probe (digital) with Bluetooth®
                              Humidity/temperature probe (digital) with Bluetooth®: for measurements in rooms, ventilation ducts, refrigeration systems and heat pumps – accuracy ±2% RH / ±0.5 °C, measuring range 0 to 100% RH / -20 to +70 °C
                               
                                :
                                0636 9731
                                £ 195.00 £ 234.00
                                1
                              • Humidity probes
                                Humidity/temperature probe (digital), wired
                                Humidity/temperature probe (digital), wired: for measurements in rooms, ventilation ducts, refrigeration systems and heat pumps – accuracy ±2% RH / ±0.5 °C, measuring range 0 to 100% RH / -20 to +70 °C
                                 
                                  :
                                  0636 9732
                                  £ 160.00 £ 192.00
                                  1
                                • Humidity probes
                                  Humidity/temperature probe head
                                  Humidity/temperature probe head: for attachment to universal Bluetooth® or cable handle – accuracy ±2% RH / ±0.5 °C, measuring range 0 to 100% RH / -20 to +70 °C
                                    :
                                    0636 9730
                                    £ 98.00 £ 117.60
                                    1
                                  • Humidity probes
                                    High-precision humidity/temperature probe (digital) with Bluetooth®
                                    High-precision humidity/temperature probe (digital) with Bluetooth®: for measurements in cleanrooms and laboratories, and critical processes in the pharmaceutical, industrial and food sectors, as well as in storage, refrigerated and work rooms or in air conditioning/ventilation ducts - accuracy: ±(0.6% RH + 0.7 % of m.v.) (0 to 90% RH) / ±0.3 °C (+15 to +30 °C)
                                      :
                                      0636 9771
                                      £ 485.00 £ 582.00
                                      1
                                    • Humidity probes
                                      High-precision humidity/temperature probe (digital), wired
                                      High-precision humidity/temperature probe (digital), wired: for measurements in cleanrooms and laboratories, and critical processes in the pharmaceutical, industrial and food sectors, as well as in storage, refrigerated and work rooms or in air conditioning/ventilation ducts - accuracy: ±(0.6% RH + 0.7 % of m.v.) (0 to 90% RH) / ±0.3 °C (+15 to +30 °C)
                                       
                                        :
                                        0636 9772
                                        £ 432.00 £ 518.40
                                        1
                                      • Humidity probes
                                        High-precision humidity/temperature probe head: for attachment to a universal Bluetooth® or cable handle – accuracy: ±(0.6% RH + 0.7 % of m.v.) (0 to 90% RH) / ±0.3 °C (+15 to +30 °C)
                                          :
                                          0636 9770
                                          £ 429.00 £ 514.80
                                          1
                                        • Humidity probes
                                          Robust humidity/temperature probe (digital) - for temperatures up to +180 °C, wired
                                          Robust humidity/temperature probe (digital) for temperatures up to +180 °C, wired: for measurements in industrial exhaust air, in bulk materials and in climatic test cabinets – accuracy ±2% RH (2.1 to 98% RH) / ±0.4 °C (0.1 to +50 °C), measuring range 0 to 100% RH / -20 to +180 °C
                                           
                                            :
                                            0636 9775
                                            £ 505.00 £ 606.00
                                            1
                                          • Humidity probes
                                            testo 605i
                                            testo 605i - thermohygrometer operated via smartphone
                                              :
                                              0560 2605 02
                                              £ 99.00 £ 118.80
                                              1

                                              • Pitot tubes

                                            • Pitot tubes
                                              Staurohr
                                              Stainless steel Pitot tube, length 500 mm, Ø 7 mm - for measuring flow velocity
                                                :
                                                0635 2045
                                                £ 160.00 £ 192.00
                                                1
                                              • Pitot tubes
                                                Staurohr
                                                Stainless steel Pitot tube, length 350 mm, Ø 7 mm - for measuring flow velocity
                                                  :
                                                  0635 2145
                                                  £ 150.00 £ 180.00
                                                  1
                                                • Pitot tubes
                                                  Staurohr
                                                  Stainless steel Pitot tube, length 1000 mm, Ø 7 mm - for measuring flow velocity
                                                    :
                                                    0635 2345
                                                    £ 439.00 £ 526.80
                                                    1
                                                  • Pitot tubes
                                                    Straight Pitot tube
                                                    In the event of dust-laden flow in ventilation ducts or process air and higher flow velocities, we recommend using a Pitot tube.
                                                      :
                                                      0635 2043
                                                      £ 299.00 £ 358.80
                                                      1
                                                    • Pitot tubes
                                                      Straight Pitot tube
                                                      In the event of dust-laden flow in ventilation ducts or process air and higher flow velocities, we recommend using a Pitot tube.
                                                        :
                                                        0635 2143
                                                        £ 347.00 £ 416.40
                                                        1
                                                      • Pitot tubes
                                                        Straight Pitot tube
                                                        In the event of dust-laden flow in ventilation ducts or process air and higher flow velocities, we recommend using a Pitot tube.
                                                          :
                                                          0635 2243
                                                          £ 504.00 £ 604.80
                                                          1

                                                          • Pressure probes

                                                        • Pressure probes
                                                          testo 510i – differential pressure measuring instrument with smartphone operation
                                                            :
                                                            0560 1510
                                                            £ 119.00 £ 142.80
                                                            1
                                                          • Pressure probes
                                                            testo 549i
                                                            testo 549i - High-pressure gauge operated via smartphone
                                                              :
                                                              0560 2549 02
                                                              £ 79.00 £ 94.80
                                                              1

                                                              • Surface probes

                                                            • Surface probes
                                                              Waterproof surface temperature probe (NTC) for flat surfaces - measuring range: -50 to +150 °C
                                                                :
                                                                0615 1912
                                                                £ 85.00 £ 102.00
                                                                1

                                                                • Temperature probes

                                                              • Temperature probes
                                                                testo 805i
                                                                testo 805i – infrared thermometer with smartphone operation
                                                                  :
                                                                  0560 1805
                                                                  £ 99.00 £ 118.80
                                                                  1
                                                                • Temperature probes
                                                                  Waterproof immersion/penetration probe with NTC temperature sensor
                                                                  Waterproof immersion/penetration probe (NTC temperature sensor) for temperature measurements in liquids and semi-solid media – measuring range -50 to +150 °C, accuracy ±0.2 °C (-25 to +74.9 °C)
                                                                    :
                                                                    0615 1212
                                                                    £ 69.00 £ 82.80
                                                                    1
                                                                  • Temperature probes
                                                                    Robust air probe with NTC temperature sensor
                                                                    Robust air probe (NTC temperature sensor) with a short response time, for measuring air temperature – measuring range -50 to +125 °C, accuracy ±0.2 °C (-25 to +80 °C)
                                                                      :
                                                                      0615 1712
                                                                      £ 70.00 £ 84.00
                                                                      1
                                                                    • Temperature probes
                                                                      Clamp probe with NTC temperature sensor for measurements on pipes (Ø 6-35 mm)
                                                                      Clamp probe (NTC temperature sensor) for measuring the surface temperature of pipes (Ø 6-35 mm) – measuring range -40 to +125 °C
                                                                        :
                                                                        0615 5505
                                                                        £ 55.00 £ 66.00
                                                                        1
                                                                      • Temperature probes
                                                                        Robuster Luftfühler, TE Typ K
                                                                        Robust air temperature probe (TC type K) – measuring range: -60 to +400 °C
                                                                          :
                                                                          0602 1793
                                                                          £ 65.00 £ 78.00
                                                                          1
                                                                        • Temperature probes
                                                                          Fast-action surface probe with sprung thermocouple strip
                                                                          Fast-action surface probe (TC type K) – measuring range -60 to +300 °C, short-term up to +500 °C
                                                                            :
                                                                            0602 0393
                                                                            £ 129.00 £ 154.80
                                                                            1
                                                                          • Temperature probes
                                                                            Fast-reaction paddle surface probe
                                                                            Fast-reaction paddle surface probe (TC type K) - Measuring range: - 0 to +300°C
                                                                              :
                                                                              0602 0193
                                                                              £ 132.00 £ 158.40
                                                                              1
                                                                            • Temperature probes
                                                                              Efficient, waterproof surface probe with small measurement head
                                                                              Efficient, waterproof surface probe with small measurement head for flat surfaces, T/C Type K
                                                                                :
                                                                                0602 0693
                                                                                £ 115.00 £ 138.00
                                                                                1
                                                                              • Temperature probes
                                                                                Fast-action surface probe with sprung thermocouple strip
                                                                                Fast-action, angled surface temperature probe (TC type K) for flat and uneven surfaces – measuring range: -60 to +300 °C
                                                                                  :
                                                                                  0602 0993
                                                                                  £ 155.00 £ 186.00
                                                                                  1
                                                                                • Temperature probes
                                                                                  Magnetic probe (TC type K) - for surface temperatures
                                                                                  Surface temperature probe with magnet (TC type K), adhesive power 20 N – Measuring range -50 to +170°C
                                                                                    :
                                                                                    0602 4792
                                                                                    £ 155.00 £ 186.00
                                                                                    1
                                                                                  • Temperature probes
                                                                                    Magnetfühler, Haftkraft ca. 10 N, mit Haft-Magneten
                                                                                    Surface temperature probe with magnet (TC type K), adhesive power 10 N – Measuring range -50 to +400°C
                                                                                      :
                                                                                      0602 4892
                                                                                      £ 175.00 £ 210.00
                                                                                      1
                                                                                    • Temperature probes
                                                                                      Waterproof surface probe with widened measurement tip
                                                                                      Waterproof surface temperature probe with widened measuring tip (TC type K) for flat surfaces – measuring range -60 to +400 °C
                                                                                        :
                                                                                        0602 1993
                                                                                        £ 65.00 £ 78.00
                                                                                        1
                                                                                      • Temperature probes
                                                                                        Pipe wrap probe with velcro strip
                                                                                        Temperature probe with Velcro (TC Type K)
                                                                                          :
                                                                                          0628 0020
                                                                                          £ 47.00 £ 56.40
                                                                                          1
                                                                                        • Temperature probes
                                                                                          Pipe wrap probe for pipe diameter 5 to 65 mm
                                                                                          Temperature probe (TC type K) with clamping bracket for measurements on pipes with Ø 5-65 mm – Measuring range -60 to +130°C, briefly up to +280°C
                                                                                            :
                                                                                            0602 4592
                                                                                            £ 130.00 £ 156.00
                                                                                            1
                                                                                          • Temperature probes
                                                                                            Clamp probe for measurements on pipes
                                                                                            Clamp probe (TC type K) for temperature measurements on pipes with Ø 15-25 mm – Measuring range -50 to +100°C, briefly up to +130°C
                                                                                              :
                                                                                              0602 4692
                                                                                              £ 75.00 £ 90.00
                                                                                              1
                                                                                            • Temperature probes
                                                                                              Efficient and fast-action immersion probe, waterproof
                                                                                              Flexible, fast-action immersion probe (TC type K) – measuring range: -60 to +1000 °C
                                                                                                :
                                                                                                0602 0593
                                                                                                £ 99.00 £ 118.80
                                                                                                1
                                                                                              • Temperature probes
                                                                                                Fast-action, waterproof immersion/penetration probe
                                                                                                Fast-action immersion/penetration probe (TC type K) – measuring range: -60 to +800 °C
                                                                                                  :
                                                                                                  0602 2693
                                                                                                  £ 120.00 £ 144.00
                                                                                                  1
                                                                                                • Temperature probes
                                                                                                  Tauch-Messspitze, biegsam, TE Typ K
                                                                                                  Immersion measuring tip with TC plug type K - for fast temperature measurements
                                                                                                    :
                                                                                                    0602 5792
                                                                                                    £ 30.00 £ 36.00
                                                                                                    1
                                                                                                  • Temperature probes
                                                                                                    Immersion measurement tip, flexible, for measurements in air
                                                                                                    Flexible immersion measuring tip (TC type K) - Measuring range: -40 to +1000°C
                                                                                                      :
                                                                                                      0602 5693
                                                                                                      £ 54.00 £ 64.80
                                                                                                      1
                                                                                                    • Temperature probes
                                                                                                      Waterproof immersion/penetration probe, TC Type K
                                                                                                      Waterproof immersion/penetration probe (TC type K) – measuring range -60 to +400 °C
                                                                                                        :
                                                                                                        0602 1293
                                                                                                        £ 51.00 £ 61.20
                                                                                                        1
                                                                                                      • Temperature probes
                                                                                                        Flexible, low-mass immersion measurement tip
                                                                                                        Exceptionally fast temperature probe (TC Type K)
                                                                                                          :
                                                                                                          0602 0493
                                                                                                          £ 130.00 £ 156.00
                                                                                                          1
                                                                                                        • Temperature probes
                                                                                                          Wasserdichter Lebensmittelfühler aus Edelstahl (IP65)
                                                                                                          Waterproof stainless steel food probe (TC type K) - measuring range: -60 to +400°C
                                                                                                            :
                                                                                                            0602 2292
                                                                                                            £ 85.00 £ 102.00
                                                                                                            1
                                                                                                          • Temperature probes
                                                                                                            Thermocouple with TC adapter, flexible, 800 mm long
                                                                                                            Flexible thermoelectric couple (TC type K, glass fibre) – Measuring range: -50 to +400°C
                                                                                                              :
                                                                                                              0602 0644
                                                                                                              £ 20.00 £ 24.00
                                                                                                              1
                                                                                                            • Temperature probes
                                                                                                              Thermocouple with TC adapter, flexible, length 1500 mm
                                                                                                              Flexible thermoelectric couple (TC type K, glass fibre) – measuring range -50 to +400°C
                                                                                                                :
                                                                                                                0602 0645
                                                                                                                £ 30.00 £ 36.00
                                                                                                                1
                                                                                                              • Temperature probes
                                                                                                                Thermocouple with TC adapter, flexible, 1500 mm long, PTFE
                                                                                                                Flexible thermoelectric couple (TC type K, PTFE) – measuring range -50 to +250°C
                                                                                                                  :
                                                                                                                  0602 0646
                                                                                                                  £ 31.00 £ 37.20
                                                                                                                  1
                                                                                                                • Temperature probes
                                                                                                                  Flexible temperature probe (digital)
                                                                                                                  Flexible temperature probe (digital) with Pt100 temperature sensor: for temperature measurements in locations that are difficult to access and in liquids – measuring range -100 to +260 °C
                                                                                                                    :
                                                                                                                    0618 0071
                                                                                                                    £ 462.00 £ 554.40
                                                                                                                    1
                                                                                                                  • Temperature probes
                                                                                                                    Robust, fast-action air probe (digital)
                                                                                                                    Robust, fast-action air probe (digital)
                                                                                                                      :
                                                                                                                      0618 0072
                                                                                                                      £ 243.00 £ 291.60
                                                                                                                      1
                                                                                                                    • Temperature probes
                                                                                                                      Immersion/penetration probe (digital)
                                                                                                                      Immersion/penetration probe (digital) with Pt100 temperature sensor: for temperature measurements in liquids and pastes – measuring range -100 to +400 °C, accuracy up to ±0.15 °C
                                                                                                                        :
                                                                                                                        0618 0073
                                                                                                                        £ 243.00 £ 291.60
                                                                                                                        1
                                                                                                                      • Temperature probes
                                                                                                                        Glass-coated laboratory probe (digital)
                                                                                                                        Glass-coated laboratory probe (Pt100 temperature sensor, digital) for temperature measurements in aggressive media – measuring range -50 to +400 °C
                                                                                                                          :
                                                                                                                          0618 7072
                                                                                                                          £ 225.00 £ 270.00
                                                                                                                          1
                                                                                                                        • Temperature probes
                                                                                                                          High-precision immersion/penetration probe (digital)
                                                                                                                          High-precision immersion/penetration probe (Pt100 temperature sensor, digital) for temperature measurements in liquids and pastes – measuring range -80 to +300 °C, accuracy up to ±0.05 °C
                                                                                                                            :
                                                                                                                            0618 0275
                                                                                                                            £ 478.00 £ 573.60
                                                                                                                            1
                                                                                                                          • Temperature probes
                                                                                                                            Pipe wrap probe with NTC temperature sensor for measurements on pipes (Ø 5-65 mm)
                                                                                                                            Pipe wrap probe (NTC temperature sensor) for measuring the surface temperature of pipes (Ø 5-65 mm) – measuring range -60 to +130 °C
                                                                                                                              :
                                                                                                                              0615 5605
                                                                                                                              £ 180.00 £ 216.00
                                                                                                                              1
                                                                                                                            • Temperature probes
                                                                                                                              testo 115i
                                                                                                                              testo 115i - Clamp thermometer operated via smartphone
                                                                                                                                :
                                                                                                                                0560 2115 02
                                                                                                                                £ 75.00 £ 90.00
                                                                                                                                1

                                                                                                                                • Velocity

                                                                                                                              • Velocity
                                                                                                                                Hot wire probe (digital) with Bluetooth® including temperature and humidity sensor
                                                                                                                                Hot wire probe (digital) with Bluetooth® including temperature and humidity sensor: for measurements in ventilation ducts – measuring range 0 to +50 m/s, -20 to +70 °C, 5 to 95% RH
                                                                                                                                  :
                                                                                                                                  0635 1571
                                                                                                                                  £ 710.00 £ 852.00
                                                                                                                                  1
                                                                                                                                • Velocity
                                                                                                                                  Hot wire probe (digital) including temperature and humidity sensor, wired
                                                                                                                                  Hot wire probe (digital) including temperature and humidity sensor, wired: for measurements in ventilation ducts – measuring range 0 to +50 m/s, -20 to +70 °C, 5 to 95% RH
                                                                                                                                    :
                                                                                                                                    0635 1572
                                                                                                                                    £ 710.00 £ 852.00
                                                                                                                                    1
                                                                                                                                  • Velocity
                                                                                                                                    Hot wire probe head including temperature and humidity sensor
                                                                                                                                    Hot wire probe head including temperature and humidity sensor: for attachment to extendable telescope for air velocity probes with universal handle – measuring range 0 to +50 m/s, -20 to +70 °C, 5 to 95% RH
                                                                                                                                      :
                                                                                                                                      0635 1570
                                                                                                                                      £ 535.00 £ 642.00
                                                                                                                                      1
                                                                                                                                    • Velocity
                                                                                                                                      Vane probe (Ø 16 mm, digital) with Bluetooth®, including temperature sensor
                                                                                                                                      Vane probe (Ø 16 mm, digital) with Bluetooth® including temperature sensor: for measurements in ventilation ducts – measuring range +0.6 to +50 m/s, -10 to +70 °C
                                                                                                                                        :
                                                                                                                                        0635 9571
                                                                                                                                        £ 782.00 £ 938.40
                                                                                                                                        1
                                                                                                                                      • Velocity
                                                                                                                                        Vane probe (Ø 16 mm, digital) including temperature sensor, wired
                                                                                                                                        Vane probe (Ø 16 mm, digital) including temperature sensor, wired: for measurements in ventilation ducts – measuring range +0.6 to +50 m/s, -10 to +70 °C
                                                                                                                                          :
                                                                                                                                          0635 9572
                                                                                                                                          £ 720.00 £ 864.00
                                                                                                                                          1
                                                                                                                                        • Velocity
                                                                                                                                          16 mm vane probe head including temperature sensor
                                                                                                                                          16 mm vane probe head including temperature sensor; for attachment to extendable telescope for air velocity probes with universal handle – measuring range +0.6 to +50 m/s, -10 to +70 °C
                                                                                                                                            :
                                                                                                                                            0635 9570
                                                                                                                                            £ 521.00 £ 625.20
                                                                                                                                            1
                                                                                                                                          • Velocity
                                                                                                                                            Hot wire probe (digital) including temperature sensor, wired
                                                                                                                                            Hot wire probe (digital) including temperature sensor, wired: for measurements in ventilation ducts – measuring range 0 to 30 m/s, -20 to +70 °C
                                                                                                                                              :
                                                                                                                                              0635 1032
                                                                                                                                              £ 229.00 £ 274.80
                                                                                                                                              1
                                                                                                                                            • Velocity
                                                                                                                                              Vane probe (Ø 16 mm, digital) wired
                                                                                                                                              Vane probe (Ø 16 mm, digital), wired: for measurements in ventilation ducts – measuring range +0.6 to +50 m/s
                                                                                                                                                :
                                                                                                                                                0635 9532
                                                                                                                                                £ 305.00 £ 366.00
                                                                                                                                                1
                                                                                                                                              • Velocity
                                                                                                                                                Fume cupboard probe (digital), wired
                                                                                                                                                Fume cupboard probe (digital), wired: for measuring inflow speed and exhaust air volume flow in fume cupboards according to DIN EN 14175-3/-4 – measuring range 0 to 5 m/s, 0 to +50 °C
                                                                                                                                                  :
                                                                                                                                                  0635 1052
                                                                                                                                                  £ 710.00 £ 852.00
                                                                                                                                                  1
                                                                                                                                                • Velocity
                                                                                                                                                  High-precision vane probe (Ø 100 mm, digital) with Bluetooth® including temperature sensor
                                                                                                                                                  High-precision vane probe (Ø 100 mm, digital) with Bluetooth® including temperature sensor: for measurements at air outlets in cleanrooms and at plate outlets, ventilation grilles or swirl outlets – measuring range +0.1 to +15 m/s, -20 to +70 °C
                                                                                                                                                    :
                                                                                                                                                    0635 9371
                                                                                                                                                    £ 825.00 £ 990.00
                                                                                                                                                    1
                                                                                                                                                  • Velocity
                                                                                                                                                    High-precision vane probe (Ø 100 mm, digital) including temperature sensor, wired
                                                                                                                                                    High-precision vane probe (Ø 100 mm, digital) including temperature sensor, wired: for measurements at air outlets in cleanrooms, as well as at plate outlets, ventilation grilles or swirl outlets – measuring range +0.1 to +15 m/s, -20 to +70 °C
                                                                                                                                                      :
                                                                                                                                                      0635 9372
                                                                                                                                                      £ 779.00 £ 934.80
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                                                                                                                                                    • Velocity
                                                                                                                                                      High-precision 100 mm vane probe head including temperature sensor
                                                                                                                                                      High-precision 100 mm vane probe head including temperature sensor: for attachment to extendable telescope for air velocity probes with universal handle or to a universal Bluetooth® or cable handle – measuring range +0.1 to +15 m/s, -20 to +70 °C
                                                                                                                                                        :
                                                                                                                                                        0635 9370
                                                                                                                                                        £ 710.00 £ 852.00
                                                                                                                                                        1
                                                                                                                                                      • Velocity
                                                                                                                                                        Vane probe (Ø 100 mm, digital) with Bluetooth® including temperature sensor
                                                                                                                                                        Vane probe (Ø 100 mm, digital) with Bluetooth® including temperature sensor: for measurements at ceiling/air outlets and at plate outlets, ventilation grilles or swirl outlets – measuring range +0.3 to +35 m/s, -20 to +70 °C
                                                                                                                                                          :
                                                                                                                                                          0635 9431
                                                                                                                                                          £ 449.00 £ 538.80
                                                                                                                                                          1
                                                                                                                                                        • Velocity
                                                                                                                                                          Vane probe (Ø 100 mm, digital) including temperature sensor, wired
                                                                                                                                                          Vane probe (Ø 100 mm, digital) including temperature sensor, wired: for measurements at ceiling/air outlets and at plate outlets, ventilation grilles or swirl outlets – measuring range +0.3 to +35 m/s, -20 to +70 °C
                                                                                                                                                            :
                                                                                                                                                            0635 9432
                                                                                                                                                            £ 399.00 £ 478.80
                                                                                                                                                            1
                                                                                                                                                          • Velocity
                                                                                                                                                            100 mm vane probe head
                                                                                                                                                            100 mm vane probe head: for attachment to extendable telescope for air velocity probes with universal handle or to universal Bluetooth® or cable handle – measuring range +0.3 to +35 m/s, -20 to +70 °C
                                                                                                                                                              :
                                                                                                                                                              0635 9430
                                                                                                                                                              £ 329.00 £ 394.80
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                                                                                                                                                            • Velocity
                                                                                                                                                              testo 405i German Design Award
                                                                                                                                                              testo 405i – thermal anemometer with smartphone operation
                                                                                                                                                                :
                                                                                                                                                                0560 1405
                                                                                                                                                                £ 119.00 £ 142.80
                                                                                                                                                                1
                                                                                                                                                              • Velocity
                                                                                                                                                                Smart Probes VAC Set
                                                                                                                                                                testo 410i – vane anemometer with smartphone operation
                                                                                                                                                                  :
                                                                                                                                                                  0560 1410
                                                                                                                                                                  £ 99.00 £ 118.80
                                                                                                                                                                  1
                                                                                                                                                                • Velocity
                                                                                                                                                                  Hot ball probe (Ø 3 mm) - for flow and temperature
                                                                                                                                                                  Hot ball probe (Ø 3 mm, digital), incl. temperature sensor, fixed cable: for measurement in non-directional air flows – measuring range 0 to 10 m/s, -20 to +70 °C
                                                                                                                                                                    :
                                                                                                                                                                    0635 1051
                                                                                                                                                                    £ 505.00 £ 606.00
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                                                                                                                                                                  • Velocity
                                                                                                                                                                    Hot wire probe
                                                                                                                                                                    Hot wire probe (Ø 7.5 mm, digital), incl. temperature sensor, fixed cable: for measurement in ventilation ducts, at plate outlets, ventilation grilles – measuring range 0 to 20 m/s, -20 to +70 °C
                                                                                                                                                                      :
                                                                                                                                                                      0635 1026
                                                                                                                                                                      £ 449.00 £ 538.80
                                                                                                                                                                      1

                                                                                                                                                                      • Accessories

                                                                                                                                                                    • Accessories
                                                                                                                                                                      Measuring tripod for IAQ and comfort level measurements
                                                                                                                                                                      Measuring tripod for IAQ and comfort level measurements, to ensure standard-compliant, secure positioning of measuring instrument and probes including transport bag
                                                                                                                                                                        :
                                                                                                                                                                        0554 1591
                                                                                                                                                                        £ 429.00 £ 514.80
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                                                                                                                                                                      • Accessories
                                                                                                                                                                        Universal Bluetooth® handle for connecting probe heads
                                                                                                                                                                        Bluetooth® handle for connecting probe heads: transmits readings conveniently via Bluetooth
                                                                                                                                                                          :
                                                                                                                                                                          0554 1111
                                                                                                                                                                          £ 109.00 £ 130.80
                                                                                                                                                                          1
                                                                                                                                                                        • Accessories
                                                                                                                                                                          Universal cable handle for connecting probe heads
                                                                                                                                                                          Cable handle for connecting probe heads: transmits readings via cable
                                                                                                                                                                            :
                                                                                                                                                                            0554 2222
                                                                                                                                                                            £ 75.00 £ 90.00
                                                                                                                                                                            1
                                                                                                                                                                          • Accessories
                                                                                                                                                                            testovent 417 volume flow straightener set
                                                                                                                                                                            testovent 417 flow straightener set for volume flow measurement, consisting of the testovent 417 volume flow straightener and the testovent 417 funnel set
                                                                                                                                                                              :
                                                                                                                                                                              0554 4173
                                                                                                                                                                              £ 278.00 £ 333.60
                                                                                                                                                                              1
                                                                                                                                                                            • Accessories
                                                                                                                                                                              testovent 417 funnel set
                                                                                                                                                                              testovent 417 funnel set for volume flow measurement, consisting of a funnel for plate outlets (Ø 200 mm) and a funnel for ventilation grilles (330 x 330 mm), used with 100 mm vane
                                                                                                                                                                                :
                                                                                                                                                                                0563 4170
                                                                                                                                                                                £ 225.00 £ 270.00
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                                                                                                                                                                              • Accessories
                                                                                                                                                                                testo 318
                                                                                                                                                                                testo 318 - Endoscope
                                                                                                                                                                                  :
                                                                                                                                                                                  0563 3185
                                                                                                                                                                                  £ 145.00 £ 174.00
                                                                                                                                                                                  1
                                                                                                                                                                                • Accessories
                                                                                                                                                                                  testo mobile BLUETOOTH®/IRDA printer
                                                                                                                                                                                  Mobile BLUETOOTH®/IRDA printer
                                                                                                                                                                                    :
                                                                                                                                                                                    0554 0622
                                                                                                                                                                                    £ 210.00 £ 252.00
                                                                                                                                                                                    1

                                                                                                                                                                                    • Accessories for measuring instrument

                                                                                                                                                                                  • Accessories for measuring instrument
                                                                                                                                                                                    USB mains unit incl. cable
                                                                                                                                                                                      :
                                                                                                                                                                                      0554 1105
                                                                                                                                                                                      £ 46.00 £ 55.20
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                                                                                                                                                                                    • Accessories for measuring instrument
                                                                                                                                                                                      Connection hose, silicone
                                                                                                                                                                                      Connection hose, silicone - max. load capacity up to 700 hPa (mbar)
                                                                                                                                                                                        :
                                                                                                                                                                                        0554 0440
                                                                                                                                                                                        £ 44.00 £ 52.80
                                                                                                                                                                                        1
                                                                                                                                                                                      • Accessories for measuring instrument
                                                                                                                                                                                        Connection hose
                                                                                                                                                                                        Connection hose silicone-free for differential pressure measurement, length 5 m, load up to maximum 700 hPa, (mbar)
                                                                                                                                                                                          :
                                                                                                                                                                                          0554 0453
                                                                                                                                                                                          £ 49.00 £ 58.80
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                                                                                                                                                                                          • Further accessories measuring instrument/probes

                                                                                                                                                                                        • Further accessories measuring instrument/probes
                                                                                                                                                                                          testovent 417 volume flow straightener
                                                                                                                                                                                          Flow straightener testovent 417
                                                                                                                                                                                            :
                                                                                                                                                                                            0554 4172
                                                                                                                                                                                            £ 115.00 £ 138.00
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                                                                                                                                                                                            • Transport and Protection

                                                                                                                                                                                          • Transport and Protection
                                                                                                                                                                                            Combi-case for testo 440 and multiple probes
                                                                                                                                                                                            Combi-case for testo 440 and multiple probes; for protecting and transporting the testo 440 (dP) air velocity and IAQ measuring instrument and multiple probes
                                                                                                                                                                                             
                                                                                                                                                                                              :
                                                                                                                                                                                              0516 4401
                                                                                                                                                                                              £ 75.00 £ 90.00
                                                                                                                                                                                              1
                                                                                                                                                                                            • Transport and Protection
                                                                                                                                                                                              Service case for volume flow measurement
                                                                                                                                                                                              Service case for volume flow measurement; for protecting and transporting the testo 440 (dP) air velocity and IAQ measuring instrument, probes and accessories for measuring volume flow
                                                                                                                                                                                               
                                                                                                                                                                                                :
                                                                                                                                                                                                0516 4900
                                                                                                                                                                                                £ 189.00 £ 226.80
                                                                                                                                                                                                1

                                                                                                                                                                                                • Long-term monitoring of indoor air quality

                                                                                                                                                                                                Poor indoor air quality due to excessive concentrations of CO2 can cause tiredness, lack of concentration and even illness. With its menu for recording readings, the testo 440 air velocity and IAQ measuring instrument is ideal for monitoring the indoor air quality. Enter the measurement time and the measuring cycle – and, for example, track the change in CO2 concentration or humidity and temperature values over the course of the day. Simply choose between probes with Bluetooth or fixed cable for CO2, CO or humidity (please order probes separately).

                                                                                                                                                                                                Convenience and maximum flexibility for duct and outlet measurements

                                                                                                                                                                                                With our large range of air velocity probes (please order separately), you can carry out simple and convenient measurements even at locations that are difficult to access in ventilation ducts or at air outlets:
                                                                                                                                                                                                you will even find it easy to carry out measurements in particularly large ducts. This is because the extendable telescope on the hot wire and vane probe (Ø 16 mm) with universal handle can be further extended using the telescope extension – enabling you to attain a total length of 2 metres.
                                                                                                                                                                                                Carry out measurements at air/ceiling outlets effortlessly and without using a ladder. Fit your vane probe (Ø 100 mm) with the telescope with 90° angle and, if necessary, with the telescope extension (both can be ordered separately).
                                                                                                                                                                                                Greater freedom thanks to Bluetooth: the air velocity probes with Bluetooth have no inconvenient cable connection to the measuring instrument, and they transmit readings up to a distance of 20 m. Press the button on the probe to operate the measuring instrument – for example, to start and stop a series of measurements (timed mean calculation).
                                                                                                                                                                                                Attach the testo 440 air velocity and IAQ measuring instrument to metal surfaces (e.g. ducts) easily using the practical magnets.
                                                                                                                                                                                                Benefit from fast calculation of the volume flow: in the “volume flow” measurement menu of the multifunction measuring instrument, configure the dimensions and geometry of the duct cross-section – the measuring instrument shows you the volume flow straight away.

                                                                                                                                                                                                Turbulence measurement in accordance with EN ISO 7730 / ASHRAE 55

                                                                                                                                                                                                Determine the degree of turbulence and the draught risk in the workplace: draught restricts the comfort level and is the most common cause of complaints about the indoor climate. The turbulence probe (please order separately) measures air velocity and air temperature, and automatically calculates the draught risk and the degree of turbulence in accordance with EN ISO 7730/ASHRAE 55.
                                                                                                                                                                                                For convenient measurements at varying heights, we recommend using our measuring tripod for comfort level measurement (please order separately). This makes it very easy to position turbulence probes in compliance with the standards.

                                                                                                                                                                                                Range of probes for cleanrooms and laboratories

                                                                                                                                                                                                The testo 440 air velocity & IAQ measuring instrument is also ideal for a wide variety of applications in cleanrooms and laboratories in conjunction with the following probes:
                                                                                                                                                                                                • High-precision flow measurement in fume cupboards with the fume cupboard probe
                                                                                                                                                                                                • Thanks to the low start-up speed of 0.1 m/s, the high-precision vane probe (Ø 100 mm) is ideal for laminar flow measurements in cleanrooms. It is available as a variant with Bluetooth or with fixed cable
                                                                                                                                                                                                • To measure the humidity in cleanrooms, we recommend the high-precision humidity/temperature probe (0636 9771 or 0636 9772). With an accuracy of ±(0.6 %RH + 0.7% of m.v.) (0 to 90 %RH), it also meets the requirements for humidity measurements in this particularly sensitive area
                                                                                                                                                                                                • Use the high-precision digital Pt100 temperature probes, for example, for high-precision comparative measurements in calibration laboratories, temperature measurements in chemical laboratories or in the cosmetics industry as well as for determining the temperature distribution in refrigerators and conditioning cabinets