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. So you can get down to work straight away! 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.

• Intuitive: clearly structured measurement menus for volume flow, parallel determination of air velocity and air temperature in ventilation ducts
• Convenient: integrated telescope that can be extended to 0.85m, with scaling, makes it easy to carry out measurements
• Reliable: absolute pressure compensation, internal data storage and USB port for data export
• As multifaceted as your challenges themselves: the air velocity and IAQ measuring instrument can be expanded with a large portfolio of digital probes