I need to pick up a new thermostat to control the temp in my borneo's cage and I have a few questions. Right now I'm using a rheostat for the undertank heater and its awfully inacurrate. Does anyone have experience with the ZOO MED 500 Watt Thermostat? the description says(from lllreptile.com):
"Precise temperature control. Range from 70 - 110 degrees. Can be used in conjunction with a timer for day / night cycle simulation. Maximum of 500 watts. Direct contact, not probe"
I was wondering how they are direct contact instead of utilizing a probe? Can anyone explain to me how these work?



