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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
£ 399.00 £ 478.80
1
  • A measuring instrument for all climate-related parameters
  • Includes a differential pressure sensor: for Pitot tube measurement and monitoring filters
  • Extendible with a wide range of probes
  • Wireless measurement with Bluetooth probes
  • USB interface for exporting measurement reports as CSV files
  • Intuitive measurement menus
  • Precise, reliable measurement of all air velocity and IAQ parameters with just one measuring instrument: 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).
    • A measuring instrument for all climate-related parameters

    Use the testo 440 dP air velocity and IAQ measuring instrument in combination with the high-quality, digital probes to measure and store all air velocity and IAQ parameters (please order probes separately). Up to 3 probes can be connected simultaneously: a Bluetooth probe, a wired probe and a temperature probe with type K thermocouple connector. Automatic probe detection and clearly structured measurement menus guarantee simple operation and will make your day-to-day work easier.

    A differential pressure sensor is already integrated in the testo 440 dP. This makes it possible to carry out measurements on filters and fans, as well as Pitot tube and K-factor measurements (please order Pitot tube separately).

     

    Measure in just a few clicks with the testo 440 dP multifunction measuring instrument

    Carry out your measurements quickly and easily: the air velocity and IAQ measuring instrument automatically detects each connected probe. This means that there is no need for you to manually reset the parameters when changing probes. Clearly structured measurement menus for measuring the volume flow in ducts/at outlets, funnel measurement, determining the volume flow via differential pressure and K-factor, measuring the degree of turbulence, determining the cooling/heating output, mould detection and long-term measurement provide you with optimum support during your day-to-day work.

     

    Wireless and space-saving: more applications, less equipment

    Endlessly versatile: a universal handle can be connected to all probe heads – so you can master more applications using less equipment and save space.

    The Bluetooth handle makes it more convenient to carry out your measurement and guarantees less cable clutter in the case. It makes it possible to carry out measurements without any bothersome cable connection and it transfers readings up to a distance of 20 m. Or as a practical alternative, use the cable handle to connect testo probe heads. This is an advantage if Bluetooth signals are not permitted.

     

    Practical measurement data management

    The multifunction measuring instrument stores up to a max. 7500 measurement protocols, which can be read via a USB port and further processed as a CSV file on your computer (e.g. with Excel). With the testo BLUETOOTH/IRDA printer (please order separately), you have the option of producing a report printout of the measurement data directly on site.

     

    Intelligent calibration concept for maximum precision

    You can rely on accurate measurement results when using our digital probes, because the measuring instrument makes measurement uncertainty a thing of the past. You only need to send the probes in for calibration. The multifunction measuring instrument can therefore remain in continuous use.

     

    Advantages of measuring with the testo 440 dP air velocity and IAQ measuring instrument

    Precise and reliable in ducts and at air outlets
     
    • Large range of connectable probes: hot wire and vane probes (Ø 16 mm) for measurements in ducts; large vane probes of Ø 100 mm for measurements at air/ceiling outlets
    • Calculate volume flow quickly: in the measurement menu, simply configure the dimensions and geometry of the duct cross-section and see the volume flow displayed on the measuring instrument straight away
    • 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 the vane probe (Ø 100 mm) with the extendable telescope with 90° angle and, if necessary, with the telescope extension (both can be ordered separately)
    • Use the vane probes in conjunction with the testovent measurement funnels and flow straighteners to test incoming / outgoing air at plate outlets, ventilation grilles and swirl outlets
    • Practical Bluetooth interface: use the air velocity probes to measure without having to deal with any bothersome cables, operate the measuring instrument by pressing the button on the handle of the probe, e.g. start or stop a timed mean calculation
    • Use the practical magnets to securely attach the multifunction measuring instrument to metal surfaces (e.g. ventilation ducts)
     
    Long-term monitoring of indoor air quality
     
    • The right probe for your requirements: probes for CO2, CO, air temperature and humidity are available as variants with Bluetooth or with fixed cable
    • Easy to use: enter the measurement period and interval in the menu for long-term measurement and track it over the course of the day
    • Internal memory for up to 7500 measurement protocols
     
    Turbulence measurement in accordance with EN ISO 7730 / ASHRAE 55
     
    • Attain a high level of accuracy, even at low air velocities, with a turbulence probe
    • Automatic calculation of draught risk and 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. This makes it very easy to position turbulence probes in compliance with the standards
     
    Range of probes for cleanrooms and laboratories
     
    • Fume cupboard probe for high-precision air velocity measurement on fume cupboards
    • 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. Available as a variant with Bluetooth or with fixed cable
    • High-precision temperature/humidity probe (0636 9771 or 0636 9772) with an accuracy of ±(0.6% RH + 0.7 % of m.v.) in the range 0 to 90% RH for measuring the humidity in cleanrooms

    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
    • 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
        £ 345.00 £ 414.00
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      • Comfort probes
        CO2 probe (digital) with Bluetooth® including temperature and humidity sensor
        CO₂ 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
          £ 509.00 £ 610.80
          1
        • Comfort probes
          CO2 probe head including temperature and humidity sensor
          CO₂ 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
            £ 399.00 £ 478.80
            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
              £ 359.00 £ 430.80
              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
                  £ 267.00 £ 320.40
                  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
                    £ 495.00 £ 594.00
                    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
                      £ 189.00 £ 226.80
                      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
                        £ 155.00 £ 186.00
                        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
                          £ 95.00 £ 114.00
                          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
                            £ 469.00 £ 562.80
                            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
                              £ 419.00 £ 502.80
                              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
                                £ 409.00 £ 490.80
                                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
                                  £ 489.00 £ 586.80
                                  1
                                • Humidity probes
                                  testo 605i
                                  testo 605i - thermohygrometer operated via smartphone
                                    :
                                    0560 2605 02
                                    £ 99.00 £ 118.80
                                    1
                                  • Pitot tubes

                                    Pressure probes

                                    Temperature probes

                                  • Temperature probes
                                    testo 805i
                                    testo 805i – infrared thermometer with smartphone operation
                                      :
                                      0560 1805
                                      £ 92.00 £ 110.40
                                      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
                                        £ 66.00 £ 79.20
                                        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
                                          £ 68.00 £ 81.60
                                          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
                                            £ 54.00 £ 64.80
                                            1
                                          • Temperature probes
                                            Robuster Luftfühler, TE Typ K
                                            Robust air temperature probe (TC type K) – measuring range: -60 to +400 °C
                                              :
                                              0602 1793
                                              £ 63.00 £ 75.60
                                              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
                                                £ 128.00 £ 153.60
                                                1
                                              • Temperature probes
                                                Fast-reaction paddle surface probe
                                                Fast-reaction paddle surface probe (TC type K) - Measuring range: - 0 to +300°C
                                                  :
                                                  0602 0193
                                                  £ 128.00 £ 153.60
                                                  1
                                                • Temperature probes
                                                  Efficient, waterproof surface probe with small measurement head
                                                  Waterproof surface temperature probe with a small measuring head (TC type K) – measuring range: -60 °C to +1000 °C
                                                    :
                                                    0602 0693
                                                    £ 110.00 £ 132.00
                                                    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
                                                      £ 147.00 £ 176.40
                                                      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
                                                        £ 151.00 £ 181.20
                                                        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
                                                          £ 168.00 £ 201.60
                                                          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
                                                            £ 63.00 £ 75.60
                                                            1
                                                          • Temperature probes
                                                            Pipe wrap probe with velcro strip
                                                            Temperature probe with Velcro (TC Type K)
                                                              :
                                                              0628 0020
                                                              £ 45.00 £ 54.00
                                                              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
                                                                £ 126.00 £ 151.20
                                                                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
                                                                  £ 70.00 £ 84.00
                                                                  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
                                                                    £ 100.00 £ 120.00
                                                                    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
                                                                      £ 116.00 £ 139.20
                                                                      1
                                                                    • Temperature probes
                                                                      Tauch-Messspitze, biegsam, TE Typ K
                                                                      Immersion measuring tip with TC plug type K - for fast temperature measurements
                                                                        :
                                                                        0602 5792
                                                                        £ 29.00 £ 34.80
                                                                        1
                                                                      • Temperature probes
                                                                        Flexible immersion measuring tip (TC type K, class 3) - measuring range -200 to +40°C
                                                                          :
                                                                          0602 5793
                                                                          £ 38.00 £ 45.60
                                                                          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
                                                                            £ 52.00 £ 62.40
                                                                            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
                                                                              £ 49.00 £ 58.80
                                                                              1
                                                                            • Temperature probes
                                                                              Flexible, low-mass immersion measurement tip
                                                                              Exceptionally fast temperature probe (TC Type K)
                                                                                :
                                                                                0602 0493
                                                                                £ 126.00 £ 151.20
                                                                                1
                                                                              • Temperature probes
                                                                                Wasserdichter Lebensmittelfühler aus Edelstahl (IP65)
                                                                                Waterproof stainless steel food probe (TC type K) - measuring range: -60 to +400°C
                                                                                  :
                                                                                  0602 2292
                                                                                  £ 81.00 £ 97.20
                                                                                  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
                                                                                    £ 19.00 £ 22.80
                                                                                    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
                                                                                      £ 29.00 £ 34.80
                                                                                      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
                                                                                        £ 30.00 £ 36.00
                                                                                        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
                                                                                          £ 448.00 £ 537.60
                                                                                          1
                                                                                        • Temperature probes
                                                                                          Robust, fast-action air probe (digital)
                                                                                          Robust, fast-action air probe (digital)
                                                                                            :
                                                                                            0618 0072
                                                                                            £ 235.00 £ 282.00
                                                                                            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
                                                                                              £ 235.00 £ 282.00
                                                                                              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
                                                                                                £ 219.00 £ 262.80
                                                                                                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
                                                                                                  £ 465.00 £ 558.00
                                                                                                  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
                                                                                                    £ 174.00 £ 208.80
                                                                                                    1
                                                                                                  • Temperature probes
                                                                                                    testo 115i
                                                                                                    testo 115i - Clamp thermometer operated via smartphone
                                                                                                      :
                                                                                                      0560 2115 02
                                                                                                      £ 69.00 £ 82.80
                                                                                                      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
                                                                                                        £ 689.00 £ 826.80
                                                                                                        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
                                                                                                          £ 689.00 £ 826.80
                                                                                                          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
                                                                                                            £ 759.00 £ 910.80
                                                                                                            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
                                                                                                              £ 699.00 £ 838.80
                                                                                                              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
                                                                                                                £ 505.00 £ 606.00
                                                                                                                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
                                                                                                                  £ 222.00 £ 266.40
                                                                                                                  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
                                                                                                                    £ 295.00 £ 354.00
                                                                                                                    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
                                                                                                                      £ 689.00 £ 826.80
                                                                                                                      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
                                                                                                                        £ 799.00 £ 958.80
                                                                                                                        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
                                                                                                                          £ 754.00 £ 904.80
                                                                                                                          1
                                                                                                                        • 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
                                                                                                                            £ 689.00 £ 826.80
                                                                                                                            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
                                                                                                                            • 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
                                                                                                                                £ 389.00 £ 466.80
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                                                                                                                              • 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
                                                                                                                                  £ 319.00 £ 382.80
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                                                                                                                                • Velocity
                                                                                                                                  testo 405i German Design Award
                                                                                                                                  testo 405i – thermal anemometer with smartphone operation
                                                                                                                                    :
                                                                                                                                    0560 1405
                                                                                                                                    £ 112.00 £ 134.40
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                                                                                                                                  • Velocity
                                                                                                                                    Smart Probes VAC Set
                                                                                                                                    testo 410i – vane anemometer with smartphone operation
                                                                                                                                      :
                                                                                                                                      0560 1410
                                                                                                                                      £ 99.00 £ 118.80
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                                                                                                                                    • 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
                                                                                                                                        £ 489.00 £ 586.80
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                                                                                                                                      • Velocity
                                                                                                                                        Thermische Strömungssonde (Hitzdraht) ~ 7,5 mm
                                                                                                                                        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
                                                                                                                                          £ 435.00 £ 522.00
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                                                                                                                                        • Accessories

                                                                                                                                          Accessories for measuring instrument

                                                                                                                                        • Accessories for measuring instrument
                                                                                                                                          USB mains unit incl. cable
                                                                                                                                            :
                                                                                                                                            0554 1105
                                                                                                                                            £ 44.00 £ 52.80
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                                                                                                                                          • Accessories for measuring instrument
                                                                                                                                            Connection hose, silicone
                                                                                                                                            Connection hose, silicone - max. load capacity up to 700 hPa (mbar)
                                                                                                                                              :
                                                                                                                                              0554 0440
                                                                                                                                              £ 42.00 £ 50.40
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                                                                                                                                            • 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
                                                                                                                                                £ 47.00 £ 56.40
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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
                                                                                                                                                  £ 109.00 £ 130.80
                                                                                                                                                  1
                                                                                                                                                • Transport and Protection


                                                                                                                                                  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).
                                                                                                                                                  Measure CO2 concentration for assessing indoor air quality with CO2 probe and testo 440

                                                                                                                                                  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.
                                                                                                                                                  Volumetric flow measurement in ventilation ducts with vane probe (Ø 16 mm) and testo 440

                                                                                                                                                  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.
                                                                                                                                                  Determining the degree of turbulence with turbulence probe and testo 440

                                                                                                                                                  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
                                                                                                                                                  Volumetric flow measurement in fume cupboards with fume cupboard probe and testo 440