Measure in just a few clicks with the testo 440 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, 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 air velocity and IAQ measuring instrument with dP

Precise and reliable in ducts and at air outlets

• Large range of connectable probes: hot wire and vane probe (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)
• Integrated differential pressure sensor

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
• Integrated differential pressure sensor

Measure in just a few clicks with the testo 440 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, 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 air velocity and IAQ measuring instrument

Precise and reliable in ducts and at air outlets

• Large range of connectable probes: hot wire and vane probe (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 delta P Air Flow ComboKit 2 with Bluetooth in detail

testo 440 dP air velocity and IAQ measuring instrument including differential pressure sensor:
 

• With an integrated differential pressure sensor, e.g. for checking filters, for Pitot tube measurement (Pitot tubes can be ordered separately) or K factor measurement
• No task is too challenging, no application too specialized: the testo 440 dP combines a compact hand-held measuring instrument with intuitive measurement menus and a wide selection of air velocity and IAQ probes (please order separately)
• Clearly structured measurement menus for carrying out measurements in ventilation ducts and at duct/ceiling outlets: the volume flow is precisely calculated thanks to convenient input of the size and geometry of the duct cross-section. Timed and multi-point mean calculation, average volume flow, current reading and min./max. values are displayed
• Other practical measurement menus, e.g. determination of volume flow via differential pressure and K factor, long-term measurement, volume flow measurement with a funnel, etc.
• Easy storage and evaluation of measurement data. Measurement data memory for up to 7500 measurement protocols, which can be read via a USB port and further processed as a CSV file on the computer (e.g. with Excel)
• Practical magnets for easy attachment of the measuring instrument to metal surfaces (e.g. ducts)
• Automatic detection of probes, e.g. vane and humidity/temperature probe
• Large, backlit colour display

 
Vane probe (Ø 100 mm) with Bluetooth including temperature sensor:
 

• Use the vane probe (Ø 100 mm) to conveniently determine air velocity, volume flow and air temperature at air/ceiling outlets
• Measuring range: +0.3 to +35 m/s, -20 to +70 °C
• More applications – less equipment: the universal handle on your 100 mm vane probe is easy to attach to other probe heads or telescopes. This allows you to expand your portfolio of probes and save space in the measuring case
• Carry out measurements at air/ceiling outlets effortlessly and without using a ladder: simply connect the vane probe to the extendable telescope with 90° angle included in the kit
• Wireless: the Bluetooth handle makes it more convenient to carry out your measurements and guarantees less cable clutter in the case
• Practical button on the handle: to store individual readings for multi-point mean calculation or to start and stop measurement series for mean calculation over time
• Our recommendation for carrying out accurate measurements at plate outlets/ventilation grilles: use the vane probe with the testovent 417 funnel set (available to order separately). If you add in the volume flow straightener (please order separately), you can achieve an impressively high level of precision when carrying out measurements at swirl outlets with turbulent air flow
• Intelligent calibration concept: the air velocity and IAQ measuring instrument remains in continuous use, since only the probe head is sent in for calibration

 
16 mm vane probe head including temperature sensor:
 

• Use the vane probe (Ø 16 mm) to determine the air velocity, volume flow and air temperature in ventilation ducts
• Measuring range: +0.6 to +50 m/s, -10 to +70 °C
• Convenient measurements in ventilation ducts: the probe head is easy to attach to the robust, non-rotatable telescope (up to 1.0 m) supplied, with easy-to-read scaling and Bluetooth handle
• Practical button on the handle: to store individual readings for multi-point mean calculation
• Our recommendation for larger ducts: use the telescope extension (available to order separately) – enabling you to attain a total length of 2 metres
• Intelligent calibration concept: only the 16 mm vane probe head needs to be sent in for calibration

 
Humidity/temperature probe head:
 

• Use the humidity/temperature probe to accurately measure relative humidity and air temperature and to calculate dew point, wet bulb temperature, absolute humidity and heating/cooling output
• Reliable measurement results thanks to a high-quality, long-term stable humidity sensor. Measuring range: 0 to 100% RH / -20 to +70 °C, accuracy: ±2% RH / ±0.5 °C
• Wireless and space-saving: the probe head is easy to attach to the universal Bluetooth handle included in the kit
• Use the practical button on the handle to store individual readings
• You only need to send in the humidity/temperature probe head for calibration

• testo 440 dP air velocity and IAQ measuring instrument including differential pressure sensor, connection hose, 3 x AA batteries, USB cable and calibration protocol (0560 4402)
• Vane probe (Ø 100 mm) with Bluetooth including temperature sensor (consisting of 100 mm vane probe head, handle adapter and Bluetooth handle); bracket for testovent measurement funnel; 4 x AA batteries and calibration protocol (0635 9431)
• 16 mm vane probe head including temperature sensor and calibration protocol (0635 9570)
• Humidity/temperature probe head (Ø 12 mm) including calibration protocol (0636 9730)
• Extendable telescope (up to 1 m in length) for flow probes with a universal handle including 90° angle (0554 0960)
• Combi-case for testo 440 and multiple probes (0516 4401)

testo 440 delta P Air Flow ComboKit 1 with Bluetooth in detail

testo 440 dP air velocity and IAQ measuring instrument including differential pressure sensor:
 

• With an integrated differential pressure sensor, e.g. for checking filters, for Pitot tube measurement (Pitot tubes can be ordered separately) or K factor measurement
• No task is too challenging, no application too specialised: the Testo 440 dP combines a compact hand-held measuring instrument with intuitive measurement menus and a wide selection of air velocity and IAQ probes (please order separately)
• Clearly structured measurement menus for carrying out measurements in ventilation ducts and at duct/ceiling outlets: the volume flow is precisely calculated thanks to convenient input of the size and geometry of the duct cross-section. Timed and multi-point mean calculation, average volume flow, current reading and min./max. values are displayed
• Other practical measurement menus, e.g. determination of volume flow via differential pressure and K factor, long-term measurement, volume flow measurement with a funnel, etc.
• Easy storage and evaluation of measurement data. Measurement data memory for up to 7500 measurement protocols, which can be read via a USB port and further processed as a CSV file on the computer (e.g. with Excel)
• Practical magnets for easy attachment of the measuring instrument to metal surfaces (e.g. ducts)
• Automatic detection of probes, e.g. vane probe, hot wire probe
• Large, backlit colour display

 
Vane probe (Ø 100 mm) with Bluetooth including temperature sensor:
 

• Use the vane probe (Ø 100 mm) to conveniently determine air velocity, volume flow and air temperature at air/ceiling outlets
• Measuring range: +0.3 to +35 m/s, -20 to +70 °C
• More applications – less equipment: the universal handle on your 100 mm vane probe is easy to attach to other probe heads or telescopes. This allows you to expand your portfolio of probes and save space in the measuring case
• Carry out measurements at air/ceiling outlets effortlessly and without using a ladder: simply connect the vane probe to the extendable telescope with 90° angle included in the kit.
• Wireless: the Bluetooth handle makes it more convenient to carry out your measurements and guarantees less cable clutter in the case
• Practical button on the handle: to store individual readings for multi-point mean calculation or to start and stop measurement series for mean calculation over time
• Our recommendation for carrying out accurate measurements at plate outlets/ventilation grilles: use the vane probe with the Testovent 417 funnel set (available to order separately). If you add in the volume flow straightener (please order separately), you can achieve an impressively high level of precision when carrying out measurements at swirl outlets with turbulent air flow
• Intelligent calibration concept: the air velocity and IAQ measuring instrument remains in continuous use, since only the probe head is sent in for calibration

Hot wire probe head including temperature and humidity sensor:
 

• Use the hot wire probe to measure air velocity, volume flow, air temperature and humidity in ventilation ducts
• Accurate measurements from 0 to +50 m/s thanks to the robust sensor and automatic absolute pressure compensation. Air temperature and humidity measuring range: -20 to +70 °C, 5 to 95% RH
• Convenient measurements in ventilation ducts: the probe head is easy to attach to the robust, non-rotatable telescope (up to 1.0 m) supplied, with easy-to-read scaling and Bluetooth handle
• Practical button on the handle: to store individual readings for multi-point mean calculation
• Our recommendation for carrying out measurements in larger ducts: use the telescope extension (available to order separately) – enabling you to attain a total length of 2 metres
• Intelligent calibration concept: only the hot wire probe head needs to be sent in for calibration

• testo 440 dP air velocity and IAQ measuring instrument including differential pressure sensor, connection hose, 3 x AA batteries, USB cable and calibration protocol (0560 4402)
• Vane probe (Ø 100 mm) with Bluetooth including temperature sensor (consisting of 100 mm vane probe head, handle adapter and Bluetooth handle); bracket for testovent measurement funnel; 4 x AA batteries and calibration protocol (0635 9431)
• Hot wire probe head (Ø 9 mm) including temperature and humidity sensor and calibration protocol (0635 1570)
• Extendable telescope (up to 1 m in length) for air velocity probes with a universal handle including 90° angle (0554 0960)
• Combi-case for testo 440 and multiple probes (0516 4401)

testo 440 Indoor Comfort ComboKit with Bluetooth in detail

testo 440 air velocity and IAQ measuring instrument:
 

• No task is too challenging, no application too specialized: the testo 440 combines a compact hand-held measuring instrument with intuitive measurement menus and a wide selection of air velocity and IAQ probes (please order separately)
• Clearly structured measurement menus: thanks to the menu guidance programmed into the instrument, you can determine the degree of turbulence and draught risk easily and reliably, in accordance with EN ISO 7730 and ASHRAE 55. Other practical measurement menus, e.g. long-term measurement: for long-term monitoring, enter the measurement time and measuring cycle in the measuring instrument and record measurement data trends
• Easy storage and evaluation of measurement data. Measurement data memory for up to 7500 measurement protocols, which can be read via a USB port and further processed as a CSV file on the computer (e.g. with Excel)
• Practical magnets for easy attachment of the measuring instrument to metal surfaces
• Automatic detection of probes, e.g. CO₂ probe, turbulence probe
• Large, backlit colour display

 
CO₂ probe with Bluetooth, including temperature and humidity sensor:
 

• Measure CO₂ concentration, humidity and air temperature and calculate dew point, wet bulb temperature and absolute humidity
• Accurate measurement results thanks to air density compensation via the integrated absolute pressure measurement
• Measuring range: 0 to 10,000 ppm, -10 to +50 °C, 5 to 95% RH
• The Bluetooth handle makes it more convenient to carry out your measurements and guarantees less cable clutter in the case
• Practical button on the handle: to store individual readings
• Endlessly versatile: a universal handle can be connected to all probe heads – so you can take care of more applications using less equipment, and save space too
• Intelligent calibration concept: the measuring instrument remains in continuous use, since only the probe head is sent in for calibration

 
Turbulence probe including air velocity and temperature sensor:
 

• Use the turbulence probe to measure air velocity and air temperature
• Determine the degree of turbulence and draught risk according to EN ISO 7730 / ASHRAE 55
• Accurate measurements from 0 to +5 m/s within the temperature range 0 to +50 °C thanks to air density compensation via the integrated absolute pressure measurement
• Our recommendation for exceptionally easy positioning of the turbulence probe in compliance with the standards: order the measuring tripod for comfort level measurements
• Use the fixed cable to connect the turbulence probe to the measuring instrument
• Intelligent calibration concept: You only need to send in the turbulence probe for calibration

• testo 440 air velocity and IAQ measuring instrument, 3 x AA batteries, USB cable and calibration protocol (0560 4401)
• CO₂ probe* with Bluetooth, including temperature and humidity sensor (consisting of CO₂ probe head and Bluetooth handle); 4 x AA batteries, table stand and calibration protocol (0632 1551)
• Turbulence probe with fixed cable (cable length 1.4 m) and calibration protocol (0628 0152)
• Combi-case for testo 440 and multiple probes (0516 4401)

*Please do not use the probe in condensing atmospheres. For continuous application in high-humidity ranges
> 80% RH at ≤ 30 °C for > 12 h
> 60% RH at > 30 °C for > 12 h
please contact Testo Service or contact us via the Testo website.

 
testo 440 Air Flow ComboKit 1 with Bluetooth in detail

testo 440 air velocity and IAQ measuring instrument:
 

• No task is too challenging, no application too specialized: the testo 440 combines a compact hand-held measuring instrument with intuitive measurement menus and a wide selection of air velocity and IAQ probes (please order separately)
• Clearly structured measurement menus for carrying out measurements in ventilation ducts/at duct outlets: the volume flow is precisely calculated thanks to convenient input of the size and geometry of the duct cross-section. Timed and multi-point mean calculation, average volume flow, current reading and min./max. values are displayed
• Other practical measurement menus, e.g. long-term measurement, volume flow measurement with a funnel, etc.
• Easy storage and evaluation of measurement data. Measurement data memory for up to 7500 measurement protocols, which can be read via a USB port and further processed as a CSV file on the computer (e.g. with Excel)
• Practical magnets for easy attachment of the measuring instrument to metal surfaces (e.g. ducts)
• Automatic detection of probes, e.g. vane probe, hot wire probe
• Large, backlit colour display

 
Vane probe (Ø 100 mm) with Bluetooth, including temperature sensor:
 

• Use the vane probe (Ø 100 mm) to easily determine air velocity, volume flow and air temperature at air/ceiling outlets
• Measuring range: +0.3 to +35 m/s, -20 to +70 °C
• More applications – less equipment: the universal handle on your 100 mm vane probe is easy to attach to other probe heads or telescopes. This allows you to expand your portfolio of probes and save space in the measuring case
• Carry out measurements at air/ceiling outlets effortlessly and without using a ladder: simply combine the vane probe with the optional, extendable telescope with 90° angle
• Wireless: the Bluetooth handle makes it more convenient to carry out your measurements and guarantees less cable clutter in the case
• Practical button on the handle: to store individual readings for multi-point mean calculation or to start and stop measurement series for mean calculation over time
• Our recommendation for carrying out accurate measurements at plate outlets/ventilation grilles: use the vane probe with the testovent 417 funnel set (available to order separately). If you add in the volume flow straightener (please order separately), you can achieve an impressively high level of precision when carrying out measurements at swirl outlets with turbulent air flow
• Intelligent calibration concept: the testo 440 air velocity and IAQ measuring instrument remains in continuous use, since only the probe head with 100 mm vane is sent in for calibration

 
Hot wire probe including temperature sensor:
 

• Use the hot wire probe to measure air velocity, volume flow and air temperature in ventilation ducts
• Accurate measurements from 0 to 30 m/s and -20 to +70 °C thanks to the robust sensor and automatic absolute pressure compensation
• Telescope that can be extended to 0.85 m, with scaling, makes it easy to measure in ventilation ducts
• Use the fixed cable to connect the hot wire probe to the measuring instrument
• Intelligent calibration concept: you only need to send in the hot wire probe for calibration, so the instrument can remain in continuous use

• testo 440 air velocity and IAQ measuring instrument, 3 x AA batteries, USB cable and calibration protocol (0560 4401)
• Vane probe (Ø 100 mm) with Bluetooth including temperature sensor (consisting of 100 mm vane probe head, handle adapter and Bluetooth handle); bracket for testovent measurement funnel, 4 x AA batteries and calibration protocol (0635 9431)
• Hot wire probe including temperature sensor with fixed cable (length 1.7 m) including temperature sensor, with telescope (can be extended to 0.85 m) and calibration protocol (0635 1032)
• Combi-case for testo 440 and multiple probes (0516 4401)