Testo 605i | Thermohygrometer for Indoor Temperature and Humidity Measurement | with Bluetooth Support

I really liked the hygrometer. Came with calibration protocol. I recommend

Works perfect with my testo 550i connectivity is spot on with Bluetooth

Testing records can be exported. Live trending while testing

Great product, easy to use

Probe works great, but issue is using with app and smartphone, manifold. Used alone with app, shows temp and hum. well. If manifold pressure is used, it reverts to temperature only readout. . Reason why 1 star taken off. Also no instructions on tip , to twist open ! I almost tried pulling the tips off until my eye caught the groove part.

Very accurate

Great item, I have others by Testo

It seems to be reasonably accurate. I have no means of verifying calibration. However, it is serving the purpose of measuring temperature and humidity across floors and rooms in my home very well. It confirmed my suspicion that my home thermostat is over reporting the temperature and under reporting humidity levels, and that I have significant variation of both thru my home.

Does not integrate with the new Testo Bluetooth gauges. Has to used a stand-alone app on your phone. Poor range as well.

Great tool to add to your toolbox if your a HVAC tech.