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

Order-Nr.  0560 4402

  • Intuitive: clearly structured measurement menus for volume flow, K-factor, degree of turbulence, cooling/heating output, mould detection and long-term measurement, such as CO₂

  • Wireless: Bluetooth® probes for extra convenience when measuring and less cable clutter in the measuring case (please order probes separately)

  • Clear and reliable: large graphic display with parallel display of 3 readings as well as internal data storage and USB port for data export

  • Includes a differential pressure sensor: for Pitot tube measurement and monitoring filters

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).

Delivery time: 3 – 5 working days

Shipping costs

£ 310.00
incl. VAT  £ 372.00
+44 1420 358121 Inquiry
Where to buy

Product Description

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

 

Delivery Scope

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)

±0.3 °C (-25 to +74.9 °C)

±0.4 °C (+75 to +99.9 °C)

±0.5 % of mv (Remaining Range)

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)

±0.2 hPa + 1.5 % of mv

(1.01 to +150 hPa)

Resolution

0.01 hPa
General technical data

Weight

250 g

Dimensions

154 x 65 x 32 mm

Operating temperature

-20 to +50 °C

Product colour

black/orange

Connectable probes

1 x digital probe with cable or 1 x Temperature NTC TUC, 1 x digital Bluetooth probe or testo Smart Probe, 1 x differential pressure (internal), 1 x Temperature TC Type K

Battery type

3 AA mignon 1.5 V

Battery life

12 h (typically vane measurement)

Interface

Bluetooth®; USB

Storage temperature

-20 to +50 °C

Comfort probes

Cross-Seller 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

Order Number: 0635 0551

£ 259.00
incl. VAT  £ 310.80
Cross-Seller 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

Order Number: 0632 1551

£ 399.00
incl. VAT  £ 478.80
Cross-Seller 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

Order Number: 0632 1552

£ 369.00
incl. VAT  £ 442.80
Cross-Seller 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

Order Number: 0632 1550

£ 319.00
incl. VAT  £ 382.80
Cross-Seller 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

Order Number: 0632 1271

£ 289.00
incl. VAT  £ 346.80
Cross-Seller 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

Order Number: 0632 1272

£ 259.00
incl. VAT  £ 310.80
Cross-Seller CO probe head
CO probe head: for attachment to universal Bluetooth® or cable handle – measuring range 0 to 500 ppm

Order Number: 0632 1270

£ 209.00
incl. VAT  £ 250.80
Cross-Seller testo 480
Globe thermometer (TC type K) for the measurement of radiant heat – measuring range 0 to + 120 °C

Order Number: 0602 0743

£ 379.00
incl. VAT  £ 454.80

Humidity probes

Cross-Seller 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
 

Order Number: 0636 9731

£ 144.00
incl. VAT  £ 172.80
Cross-Seller 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
 

Order Number: 0636 9732

£ 117.00
incl. VAT  £ 140.40
Cross-Seller 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

Order Number: 0636 9730

£ 73.00
incl. VAT  £ 87.60
Cross-Seller 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)

Order Number: 0636 9771

£ 365.00
incl. VAT  £ 438.00
Cross-Seller 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)
 

Order Number: 0636 9772

£ 339.00
incl. VAT  £ 406.80
Cross-Seller High-precision humidity/temperature probe head
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)

Order Number: 0636 9770

£ 300.00
incl. VAT  £ 360.00
Cross-Seller 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
 

Order Number: 0636 9775

£ 390.00
incl. VAT  £ 468.00
Cross-Seller testo 605i
testo 605i - thermohygrometer operated via smartphone

Order Number: 0560 2605 02

£ 75.00
incl. VAT  £ 90.00

Pitot tubes

Cross-Seller Staurohr
Stainless steel Pitot tube, length 500 mm, Ø 7 mm - for measuring flow velocity

Order Number: 0635 2045

£ 119.00
incl. VAT  £ 142.80
Cross-Seller Staurohr
Stainless steel Pitot tube, length 350 mm, Ø 7 mm - for measuring flow velocity

Order Number: 0635 2145

£ 99.00
incl. VAT  £ 118.80
Cross-Seller Staurohr
Stainless steel Pitot tube, length 1000 mm, Ø 7 mm - for measuring flow velocity

Order Number: 0635 2345

£ 309.00
incl. VAT  £ 370.80

Pressure probes

Cross-Seller testo 510i
testo 510i – differential pressure measuring instrument with smartphone operation

Order Number: 0560 1510

£ 77.00
incl. VAT  £ 92.40
Cross-Seller testo 549i
testo 549i - High-pressure gauge operated via smartphone

Order Number: 0560 2549 02

£ 59.00
incl. VAT  £ 70.80

Temperature probes

Cross-Seller testo 905i
testo 905i – thermometer with smartphone operation

Order Number: 0560 1905

£ 59.00
incl. VAT  £ 70.80
Cross-Seller testo 805i
testo 805i – infrared thermometer with smartphone operation

Order Number: 0560 1805

£ 69.00
incl. VAT  £ 82.80
Cross-Seller 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)

Order Number: 0615 1212

£ 55.00
incl. VAT  £ 66.00
Cross-Seller 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

Order Number: 0615 5505

£ 39.00
incl. VAT  £ 46.80
Cross-Seller Robuster Luftfühler, TE Typ K
Robust air temperature probe (TC type K) – measuring range: -60 to +400 °C

Order Number: 0602 1793

£ 48.70
incl. VAT  £ 58.44
Cross-Seller 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

Order Number: 0602 0393

£ 99.00
incl. VAT  £ 118.80
Cross-Seller Fast-reaction paddle surface probe
Fast-reaction paddle surface probe (TC type K) - Measuring range: - 0 to +300°C

Order Number: 0602 0193

£ 103.00
incl. VAT  £ 123.60
Cross-Seller 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

Order Number: 0602 0693

£ 89.00
incl. VAT  £ 106.80
Cross-Seller 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

Order Number: 0602 0993

£ 116.00
incl. VAT  £ 139.20
Cross-Seller Flat head surface probe with telescopic handle max. 680 mm
Surface temperature probe (TC Type K) with telescope

Order Number: 0602 2394

£ 260.00
incl. VAT  £ 312.00
Cross-Seller 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

Order Number: 0602 4792

£ 125.00
incl. VAT  £ 150.00
Cross-Seller 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

Order Number: 0602 4892

£ 139.00
incl. VAT  £ 166.80
Cross-Seller 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

Order Number: 0602 1993

£ 48.70
incl. VAT  £ 58.44
Cross-Seller Pipe wrap probe with velcro strip
Temperature probe with Velcro (TC Type K)

Order Number: 0628 0020

£ 34.90
incl. VAT  £ 41.88
Cross-Seller 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

Order Number: 0602 4592

£ 104.00
incl. VAT  £ 124.80
Cross-Seller 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

Order Number: 0602 4692

£ 53.00
incl. VAT  £ 63.60
Cross-Seller Efficient and fast-action immersion probe, waterproof
Flexible, fast-action immersion probe (TC type K) – measuring range: -60 to +1000 °C

Order Number: 0602 0593

£ 77.00
incl. VAT  £ 92.40
Cross-Seller Fast-action, waterproof immersion/penetration probe
Fast-action immersion/penetration probe (TC type K) – measuring range: -60 to +800 °C

Order Number: 0602 2693

£ 95.00
incl. VAT  £ 114.00
Cross-Seller Tauch-Messspitze, biegsam, TE Typ K
Immersion measuring tip with TC plug type K - for fast temperature measurements

Order Number: 0602 5792

£ 22.60
incl. VAT  £ 27.12
Cross-Seller Immersion tip, flexible, TC Type K
Flexible immersion measuring tip (TC type K, class 3) - measuring range -200 to +40°C

Order Number: 0602 5793

£ 28.70
incl. VAT  £ 34.44
Cross-Seller Immersion measurement tip, flexible, for measurements in air
Flexible immersion measuring tip (TC type K) - Measuring range: -200 to +1300°C

Order Number: 0602 5693

£ 40.90
incl. VAT  £ 49.08
Cross-Seller Waterproof immersion/penetration probe, TC Type K
Waterproof immersion/penetration probe (TC type K) – measuring range -60 to +400 °C

Order Number: 0602 1293

£ 33.90
incl. VAT  £ 40.68
Cross-Seller Flexible, low-mass immersion measurement tip
Exceptionally fast temperature probe (TC Type K)

Order Number: 0602 0493

£ 104.00
incl. VAT  £ 124.80
Cross-Seller Wasserdichter Lebensmittelfühler aus Edelstahl (IP65)
Waterproof stainless steel food probe (TC type K) - measuring range: -60 to +400°C

Order Number: 0602 2292

£ 65.00
incl. VAT  £ 78.00
Cross-Seller Thermocouple with TC adapter, flexible, 800 mm long
Flexible thermoelectric couple (TC type K, glass fibre) – Measuring range: -50 to +400°C

Order Number: 0602 0644

£ 13.90
incl. VAT  £ 16.68
Cross-Seller Thermocouple with TC adapter, flexible, length 1500 mm
Flexible thermoelectric couple (TC type K, glass fibre) – measuring range -50 to +400°C

Order Number: 0602 0645

£ 22.60
incl. VAT  £ 27.12
Cross-Seller Thermocouple with TC adapter, flexible, 1500 mm long, PTFE
Flexible thermoelectric couple (TC type K, PTFE) – measuring range -50 to +250°C

Order Number: 0602 0646

£ 23.50
incl. VAT  £ 28.20
Cross-Seller 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

Order Number: 0615 5605

£ 139.00
incl. VAT  £ 166.80
Cross-Seller testo 115i
testo 115i - Clamp thermometer operated via smartphone

Order Number: 0560 2115 02

£ 49.00
incl. VAT  £ 58.80

Velocity

Cross-Seller 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

Order Number: 0635 1571

£ 579.00
incl. VAT  £ 694.80
Cross-Seller 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

Order Number: 0635 1572

£ 559.00
incl. VAT  £ 670.80
Cross-Seller 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

Order Number: 0635 9571

£ 599.00
incl. VAT  £ 718.80
Cross-Seller 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

Order Number: 0635 9572

£ 579.00
incl. VAT  £ 694.80
Cross-Seller 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

Order Number: 0635 9570

£ 429.00
incl. VAT  £ 514.80
Cross-Seller 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

Order Number: 0635 1032

£ 179.00
incl. VAT  £ 214.80
Cross-Seller 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

Order Number: 0635 9532

£ 229.00
incl. VAT  £ 274.80
Cross-Seller 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

Order Number: 0635 1052

£ 559.00
incl. VAT  £ 670.80
Cross-Seller 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

Order Number: 0635 9371

£ 639.00
incl. VAT  £ 766.80
Cross-Seller 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

Order Number: 0635 9372

£ 609.00
incl. VAT  £ 730.80
Cross-Seller 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

Order Number: 0635 9370

£ 549.00
incl. VAT  £ 658.80
Cross-Seller 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

Order Number: 0635 9432

£ 319.00
incl. VAT  £ 382.80
Cross-Seller 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

Order Number: 0635 9430

£ 249.00
incl. VAT  £ 298.80
Cross-Seller testo 405i exhaust air volume flow set
testo 405i – thermal anemometer with smartphone operation

Order Number: 0560 1405

£ 82.00
incl. VAT  £ 98.40
Cross-Seller Smart Probes VAC Set
testo 410i – vane anemometer with smartphone operation

Order Number: 0560 1410

£ 69.00
incl. VAT  £ 82.80
Cross-Seller 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

Order Number: 0635 1026

£ 349.00
incl. VAT  £ 418.80
Cross-Seller Hot ball probe
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

Order Number: 0635 1051

£ 399.00
incl. VAT  £ 478.80

Accessories

Cross-Seller testo BLUETOOTH ® -/IRDA printer
BLUETOOTH®-/IRDA printer with Bluetooth® and IrDA interface for printing out measurement data and graphs from compatible Testo measuring instruments or Testo Apps

Order Number: 0554 0621

£ 289.00
incl. VAT  £ 346.80
Cross-Seller Universal Bluetooth® handle for connecting probe heads
Bluetooth® handle for connecting probe heads: transmits readings conveniently via Bluetooth

Order Number: 0554 1111

£ 83.00
incl. VAT  £ 99.60
Cross-Seller Universal cable handle for connecting probe heads
Cable handle for connecting probe heads: transmits readings via cable

Order Number: 0554 2222

£ 55.00
incl. VAT  £ 66.00

Accessories for measuring instrument

Cross-Seller 0554-1105-p-ac-oth-003663.jpg
USB mains unit incl. cable

Order Number: 0554 1105

£ 36.50
incl. VAT  £ 43.80
Cross-Seller Connection hose, silicone
Connection hose, silicone - max. load capacity up to 700 hPa (mbar)

Order Number: 0554 0440

£ 34.90
incl. VAT  £ 41.88
Cross-Seller Connection hose
Connection hose silicone-free for differential pressure measurement, length 5 m, load up to maximum 700 hPa, (mbar)

Order Number: 0554 0453

£ 34.90
incl. VAT  £ 41.88

Transport and Protection

Cross-Seller 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
 

Order Number: 0516 4401

£ 52.00
incl. VAT  £ 62.40
Cross-Seller 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
 

Order Number: 0516 4900

£ 145.00
incl. VAT  £ 174.00
Details

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