These thermostats with a sturdy steel cover are provided with a liquid filled sensing element. This element is formed to achieve maximum sensitivity to surrounding air temperature changes. Coupled with a highly efficient diaphragm and leverage mechanism, the element operates a totally enclosed Penn switch contact with a close differential switching action without the use of heat or cool anticipators.THERMOSTAT, F/CLG 40/90F,LINE VOLT SPST, STD DUTY,KNOB ADJ, OFF-AUTO
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