When using my zoomat and the thermostat I ordered from petsmart had huge probe no possible way to mount between glass and pad so I used alluminum tape and put it on the back side of the Mat and taped around the whole pad and sensors then hot glued my acurite thermoter probe to the surface and have had good results from that according to temp probe I'm only getting 1-2 degree difference from when it turns on and off also temp gun regularly to make sure probe is reading correct