192-221 Siemens Thermostat

This 192 Powerstar single setpoint pneumatic Room Thermostat is reverse acting for heating or cooling applications, 18 to 25 psi air supply provides proportional single output, single setpoint, one-pipe low air capacity non-relay room temperature control. Celsius scale. Wall plate and mounting screws are included. ; The 192-221 RM STAT SSP 7/30C 1 PIPE RA