Testo 440 Hot Wire Kit
- Intuitive: Clearly structured measurement menu for volume flow and parallel determination of air velocity, volume flow and air temperature in ventilation ducts.
- Convenient: Integrated telescope that can be extended to 0.85 m, with scaling, makes it easy to carry out measurements.
- Reliable: Absolute pressure compensation, internal data storage and USB port for data export.
- Versatile: The air velocity and IAQ measuring instrument can be expanded with a large portfolio of digital probes.
Kit for carrying out measurements in ventilation ducts: the testo 440 air velocity and IAQ measuring instrument and the hot wire probe (Ø 9 mm) including temperature sensor are all safely stowed away in the case. This allows you to get to work straight away.
Product Description
Use this practical kit to measure air velocity, volume flow and air temperature in ventilation ducts. The testo 440 multifunction measuring instrument and the hot wire probe feature an intelligent calibration concept, ease of use and maximum convenience for the adjustment of air-conditioning and ventilation systems.
Testo 440 Hot Wire Kit in detail
testo 440 air velocity and IAQ measuring instrument:
- The testo 440 combines a compact hand-held measuring instrument with intuitive measurement menus and a wide selection of air velocity and IAQ probes.
- Clearly structured measurement menus: Volume flow is precisely calculated via input of the size and geometry of the duct cross-section. Displays timed and multi-point mean calculation, average volume flow, current reading and min./max. values.
- Other practical measurement menus included, such as long-term measurement and volume flow measurement with a funnel.
- Easy storage and evaluation of measurement data: Memory for up to 7,500 measurement protocols, readable via USB port as a CSV file (e.g., for Excel).
- Practical magnets for easy attachment of the measuring instrument to metal surfaces like ducts.
- Automatic detection of probes and a large, backlit colour display.
Hot wire probe (Ø 9 mm) including temperature sensor:
- 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 extends to 0.85 m with scaling for easy measurement in ducts.
- Intelligent calibration concept: Only the probe needs to be sent for calibration, allowing the measuring instrument to remain in continuous use.
Delivery Scope
- 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 (1.7 m) including temperature sensor, with telescope (extends to 0.85 m) and calibration protocol.
- Basic case for testo 440 and one probe.




















