... ,000 cycles Custom-made is acceptable Thermostatic Control, Thermtrol, temperature control, Termostato, Termostat, Stat, Temperature Controller, Switches, Temperature Switch, Thermal Switch, Sensor, Heater Thermostat, Heater ... Thermostat, best thermtrol PRINCIPLE OF OPERATION: With temperature rise, the expansion of liquid medium filled in sensing bulb & bellow part drives the ...