Oh ok,lol,I gotcha.good thinking
I keep my probe thermometer in the tank right above the center of the UTH to make sure my heat mat is working properly. I very rarely use my temp gun..I also have a hydrofarm thermostat regulating the UTH
I would not recommend keeping the probe inside the tank, if the snake urinates or spills water on the probe, the probe will sense a drop in temperature causing the UTH to spike in temperature, which can result in a burn to your snake or worse.
0.0.1 Normal Ball Python
1.0 Albino Ball Python
0.1 Het Snow BCI
1.0 Lesser Ball Python