The Fandis TRT-10A230V-NCF 110-250 VAC bimetallic sensor thermostat is used to control the temperature inside enclosures. These normally closed thermostats are used to switch a cabinet fan on at a pre-set maximum temperature, replacing the warm air with cooler ambient air. The Fandis TRT-10A230V-NCF normally-closed thermostat can also activate an alarm to indicate high internal temperature. Comes in Fahrenheit scale, 14-176 F.