With the testo 405i hot wire anemometer, you can measure air velocities, temperatures and volume flows. Via Bluetooth, the readings are transmitted wirelessly straight to the testo Smart Probes App on your smartphone or tablet. You can view the values conveniently and use numerous intelligent features:

 for measuring volume flow, air velocity and temperature
 Simple configuration of the dimension and geometry of the duct cross-section for determining the volume flow
 Convenient for working in ventilation ducts thanks to its telescopic tube, which can be extended up to 400 mm
 Really convenient to operate thanks to the testo Smart Probes App (e.g. easy viewing of readings, measurement data trend, log function)