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The Habistat Pulse Thermostat is ideal for controlling higher power ceramic heaters and for heat mats. A normal thermostat switches a heater on full power until the set temperature is achieved. It then switches the heater off completely until the temperature drops below the set value, when the cycle starts over again. The gap between the heater being switched on and then off is called hysteresis. It is between these points that the accuracy of the controller is assessed. The pulse proportional thermostat pulses electricity to the heater all the time, resulting in constant and very accurately managed warmth.