Testo® 400 - Flow set with hot-wire probe

Ideal set for climate professionals with a focus on volume flow measurement. You get the universal climate meter testo 400 with intuitive measuring menus, a hot-wire probe head (incl. temperature and humidity sensor), an impeller probe head (Ø 100 mm) and a high-precision humidity-temperature probe head - all three attachable to the included Bluetooth® handle. For measurements on ceiling outlets, simply combine the 100 mm impeller probe with the telescope (extendable up to 1.0 m) and the 90° angle.