Kit for carrying out measurements in ventilation ducts: the testo 440 air velocity and IAQ measuring instrument and the vane probe (Ø 16 mm) are safely stowed away in the case. So you can get down to work straight away! Use this practical kit to measure air velocity and volume flow in ventilation ducts. The testo 440 multifunction measuring instrument and the vane 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 menu for volume flow and determination of air velocity in ventilation ducts
• Convenient: integrated telescope that can be extended to 0.85m, with scaling, makes it easy to carry out measurements
• Reliable: 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