Review on REOTEMP S2 F1 Clamp Surface Thermometer by Jeremy Hahn

I use this in a water underfloor heating for the rear (cold) side. I already have a combination temp and pressure gauge on the hot side, but it's nice to use to see the return water temp. This gives a good idea of the temperature drop in the loops. It's a little loose on the 3/4 inch pipe with the long spring they send, but you can shorten it and it holds up pretty well. If you install it in a place with vibration, you should consider sticking it on the pipe. instead of this. Accuracy. close. I checked with a time gun and it seems to be off about 3 degrees at 155F. Of course I wouldn't use this for something that requires a lot more precision, but it's fine for my purpose. We'll see how long it lasts but no complaints so far.