These heating pads do not need a thermostat. The pad limitation is 30-35 above air temperature (provided the pad surface is uncovered) and is not dependent on any type of internal or external control feature. Element size, type, density, and the surface area allow heat dissipation into the air and limits the surface temperature of the pad. You can only further limit the output with a Manual, Rheostat control (FE-00F911) that reduces the power flowing to the pad at a fixed level, thereby reducing the heat produced. Or, by using a Thermostatic Control that variably regulates the power flowing to pads based on air temperature changes. Depending on what the supplemental heat requirements of a particular type of animal are, and the air temperatures/environment where a pad is being used, either control may be acceptable if needed.
In most cases, our customers use no control at all and simply unplug pads when no supplemental heat is needed. Or, plug them into a household timer that automatically shuts off power during warm parts of the day (a very common practice with exotic, cold-blooded animals in Southern U.S. states).