Siemens 192-209 Pneumatic Room Thermostat 2-Pipe, Heat/Cool, RA/DA, 45/85F

Siemens 192-209, Room Temp Thermostat, Dual Setpoint, RA Heat, DA Cool, Fahrenheit, 2-pipe.

Powerstar 192 series Heating/Cooling Pneumatic Room Thermostat, reverse acting heating @ 25 psi, direct acting cooling @ 18 psi, proportional dual setpoint, single output, two-pipe high air capacity room temperature control. Fahrenheit scale. Wall plate and mounting screws included.