Siemens 192-204 DA Pneumatic Stat 2 Pipe Dark Numerals

The 192-204 thermostat is a temperature sensing device that controls pneumatic valves and damper actuators in heating and cooling applications such as air conditioner, space heaters, unit ventilators, and air volume controllers. The thermostats maintain energy management and occupant comfort. 192-204 specifically is a direct acting, two pipe relay, which reads in Fahrenheit and is exposed at the bottom of the cover.