Compact professional measuring device from the Testo Smart probes series for use with smartphones/tablets · Measurement of air velocity, temperature and volume flow. The hot-wire anemometer testo405i is used in combination with a smartphone or tablet to the compact measuring device for air speeds, temperatures and volume flows. Equipped with a telescopic tube allows up to 400 mm flexible operations in rooms and channels. On the terminal device installed on the testo Smart Probes App, users can conveniently read your measurement values, volume flow measurements quickly and easily configure as well as timed and point mean values reliably determined. Finally, the measurement data records as a PDF or Excel files directly can be sent. In conjunction with the thermo-hygrometer Testo 605 i makes the testo 405 i can, for the determination of heating and cooling performance.This text is machine translated.