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

Fantastic probes with clear readings on the app. Grabbed two and my TD was always spot on. Discovered low charges more accurately than a thermometer.

Bought this tool for my boyfriend who’s a HVAC tech. App is clean and easy to use. He was very pleased.

Helps when tracking temperature and humidity in many applications. I use it to check the temperature inside WI coolers during unit startup. This probe along with the pressure and temperature sensors allow for TEV adjustment and monitoring out side the cooler in most cases. You can also use it to determine the correct charging of AC systems using piston type metering devices to determine wet bulb temperature of the space. I’ve just loaded the new testo App but the older one worked well for me.

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.

Nice

Great item, I have others by Testo

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

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.