I need help with a thermostat for my corn snake?

Its going to measure the air temp in your viv. Just make sure if you have a heating pad ,its covered well snakes like to burrow under substrate and can get burned. I had a corn snake and I use ambient temps in my room with lighting. Worked perfectly. Cornsnakes like it cooler then people seem to think. I kept my temps in the range of 73-85 If you have a cool side warm side your fine. Never had any temp problems.