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- testo 440 Hot Wire Kit
0563 4400
testo 440 Hot Wire Kit
0563 4400
testo 440 Hot Wire Kit
The testo 440 Hot Wire Kit is a versatile and professional measuring solution designed for accurate monitoring of air velocity, temperature, and IAQ parameters in ventilation ducts. It includes a multifunction instrument and a telescopic hot wire probe, ideal for HVAC and indoor air quality assessments.
- Comprehensive IAQ Measurement – Measures all IAQ parameters, including flow velocity, temperature, humidity, pressure, CO2, CO, and more.
- Easy to use – Intuitive menu and extendable telescope (up to 0.85 m) with scaling for convenient duct access
- Extensible with Probes – Compatible with Bluetooth® and cable probes for flexible measurement options.
- Reliable airflow measurements – Hot wire probe with temperature sensor for precise duct airflow assessment
- Data Management & Reporting – Includes analytical software for easy data analysis, reporting, and customer management.
With an extendable telescope up to 0.85 m and clearly scaled markings, the kit enables accurate airflow measurements even in deep or hard-to-reach duct areas. The intuitive menu system simplifies setup and operation, especially when determining volume flow and duct air velocity.
Designed for professionals in HVAC, facility management, and building inspection, the testo 440 device supports digital Bluetooth® and wired probes, ensuring seamless expansion for CO₂, humidity, pressure, and more. The system’s smart data management capabilities allow efficient reporting and export of measurement data for compliance or analysis purposes.
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Temperature - NTC
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)
Temperature - TC Type K (NiCr-Ni) | Measuring range -200 to +1370 °C |
|---|---|
Accuracy ±(0.3 °C + 0.3 % of mv) | |
Resolution 0.1 °C | |
General technical data
General technical data | Weight 250 g |
|---|---|
Dimensions 154 x 65 x 32 mm | |
Operating temperature -20 to +50 °C | |
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 Temperature TC Type K | |
Product colour black/orange | |
Battery type 3 AA mignon 1.5 V | |
Battery life 12 h (typically vane measurement) | |
Interface Bluetooth®; USB | |
Storage temperature -20 to +50 °C | |
Temperature - NTC
Temperature - NTC | Measuring range -20 to +70 °C |
|---|---|
Accuracy ±0.5 °C | |
Resolution 0.1 °C | |
Absolute Pressure
Absolute Pressure | Measuring range +700 to +1100 hPa |
|---|---|
Accuracy ±3.0 hPa | |
Resolution 0.1 hPa | |
Velocity - Hot wire
Velocity - Hot wire | Measuring range 0 to 30 m/s |
|---|---|
Accuracy ±(0.5 m/s + 5 % of mv) (0 to 20 m/s) ±(0.03 m/s + 4 % of mv) (20.01 to 30 m/s) | |
Resolution 0.01 m/s | |
General technical data
General technical data | Storage temperature -20 to +70 °C |
|---|---|
Weight 90 g | |
Dimensions 315 x 12 x 12 mm | |
Operating temperature -20 to +70 °C | |
Cable length 1.7 m | |
Length telescope 850 mm | |
Probe head diameter 9 mm | |
Diameter telescope 12 mm | |
Product colour Black; silver | |
Diameter probe shaft 12 mm | |
- testo 440 air velocity and IAQ measuring instrument, 3 x AA batteries, USB cable and calibration protocol
- Hot wire probe (Ø 9 mm) with fixed cable (length 1.7 m) including temperature sensor, with telescope (can be extended to 0.85 m) and calibration protocol (0635 1032)
- Basic case for testo 440 and 1 probe
Comfort probes
Food probes
Humidity probes
Pressure probes
Surface probes
Temperature probes
Velocity
Sets
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.
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.
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).
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.
For convenient measurements at varying heights, we recommend using our measuring tripod for comfort level measurement (please order separately). This makes it very easy to position turbulence probes in compliance with the standards.
Range of probes for cleanrooms and laboratories
The testo 440 air velocity & IAQ measuring instrument is also ideal for a wide variety of applications in cleanrooms and laboratories in conjunction with the following probes:
- High-precision flow measurement in fume cupboards with the fume cupboard probe
- Thanks to the low start-up speed of 0.1 m/s, the high-precision vane probe (Ø 100 mm) is ideal for laminar flow measurements in cleanrooms. It is available as a variant with Bluetooth or with fixed cable
- To measure the humidity in cleanrooms, we recommend the high-precision humidity/temperature probe (0636 9771 or 0636 9772). With an accuracy of ±(0.6 %RH + 0.7% of m.v.) (0 to 90 %RH), it also meets the requirements for humidity measurements in this particularly sensitive area
- Use the high-precision digital Pt100 temperature probes, for example, for high-precision comparative measurements in calibration laboratories, temperature measurements in chemical laboratories or in the cosmetics industry as well as for determining the temperature distribution in refrigerators and conditioning cabinets
- see instruction manual for instructions on how to update your device
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