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

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

Very accurate

If you want to set this unit up somewhere that is not easily accessible and walk out of Bluetooth range the Bluetooth shuts off after 10-15 minutes or so. So then you have to climb back up to where ever to restart the Bluetooth so you can reconnect to it. I was going to buy more of these tools but they all probably have this issue. There should be a way to disable auto shutoff.

If you have an older phone or a phone that hasnt been updated to the newest android or ios then this tool will work great. However, if you have a newer phone, particularly a samsung, then check the reviews on the play store. The app is nearly unusable on newer phones. Several features dont work properly and it is extremely buggy.

Testing records can be exported. Live trending while testing

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

Of you arent taking delta T on both wet and dry bulb temps your missing a big part of what the HVAC-R system is doing. This doesnt have the greatest range but both that has to do a lot with building materials between you and the probes. They are accurate and precise because they almost match each other. Great for diagnostics and for quickly giving value added to preventative maintenances.

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