Siemens 192-221 Pneumatic Room Thermostat 1-Pipe, Single Setpoint, RA, 7/30C

Siemens 192-221, Room Thermostat, Pneumatic, Single Setpoint, RA Heat/Cool, Celsius, 1-pipe.

Powerstar 192 series single setpoint pneumatic Room Thermostat, reverse acting for heating or cooling applications, 18 to 25 psi air supply, proportional single output, single setpoint, one-pipe low air capacity non-relay room temperature control. Celsius scale. Wall plate and mounting screws are included.