OVERVIEW: QC Series
Laird’s temperature controllers are specifically designed to control thermoelectric assemblies, (TEAs) in a closed loop system. Feedback from a temperature sensor is used to vary the output of the power supply to control the temperature of an enclosure. Laird offers three types of controllers: Single Directional Thermostatic, Bi-Directional Thermostatic, and Proportional Integral Derivative (PID) (Programmable). ? A Single Directional Thermostatic Controller can maintain a constant temperature set point within an enclosure surrounded by a relatively constant ambient temperature. The set point tolerance is defined by a hysteresis range. Once the set point is achieved, the controller shuts off the TEA. When the control temperature changes to outside the hysteresis range, the controller turns on power to the TEA and restarts the cooling mode process. This cycle continues until the controller is shut down. Thermostatic control is often used in refrigeration mode in an indoor environment with climate control, where a narrow temperature swing can be tolerated. ? Temperature controllers can accommodate more advanced options. Outputs are available for fan, thermoelectric module, thermistor, tachometer sensor on fan, overheating thermostat switch, alarm and LED. However, interface with Laird is required to customize temperature controller settings to meet your unique application requirements. Consult with a Laird engineer on customized solutions relating to specific design criteria. MOQ applies.