The ET141 remote bulb thermostat incorporates a temperature-sensitive liquid-filled
sensing element that actuates precision snap-acting switches through a diaphragm and
linkage mechanism. The switches are Single-Pole, Double-Throw (SPDT) snap-acting
type, totally enclosed, and are suitable for low or line voltage power switching.
These remote bulb thermostats are commonly used for the control of temperature in heating and/or cooling installations. They are used to directly operate two-position damper motor actuators, motor actuated valves, relays, and other similar equipment. Applications include their use as high or low temperature control functions, summer-winter changeover, and the direct control of liquid or air temperatures where two-position (on-off) control is acceptable.