Electromechanical Thermoswitch temperature controllers do not require an external power source and respond quickly to temperature changes in extreme conditions. Available in probe or surface-mount configurations, the controller uses the differential expansion of metals to control internal electrical contacts and regulate temperature. Probe-type controllers provide instant on/off control with ±1°F precision in most applications. Surface-mount controllers are installed in direct contact with the heated surface, so any temperature change is sensed virtually instantly. They offer a narrow temperature differential and minimum contact rating of 100,000 cycles.
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