Laird Thermal Systems’ temperature controller product line is specifically designed to precisely control Thermoelectric Cooler Assemblies in closed loop systems. Feedback from a temperature sensor is used to vary the output of the power supply to control the temperature of an enclosure. Laird’s controllers are ideal for applications requiring cooling and heating modes, heating and cooling systems or refrigeration only. Laird Thermal Systems offers three types of controllers: Single Directional Thermostatic, Proportional Integral Derivative (PID) programmable and Bi-directional Thermostatic control.