Thermostats Non-spring return Spring return
192-202 | Room Temp Thermostat, Pneumatic, DA, Heat/Cool, Fahrenheit, 2-pipe | Siemens
188-0031 | Thermostat, Pneumatic, Unit Mounted, DA, Liquid Filled Bulb | Siemens
192-204 | Room Temp Thermostat, Pneumatic, Dual Setpoint, DA, Day/Night, Fahrenheit | Siemens
192-200 | Room Temp Thermostat, Pneumatic, Single Setpoint, DA, Heat/Cool, Fahrenheit | Siemens
192-850 | Room Thermostat Kit, Pneumatic, RETROLINE, DA, Celsius, SSP | Siemens
188-0034 | Thermostat, Pneumatic, Unit Mounted, DA/RA, Heat/Cool, Liquid Filled Bulb | Siemens
275-03109 | Valve assy 2W NO, 1/2" 1.6Cv Eq Pct SS Trim FxF, float El-Hydraul Act NSR | Siemens
192-222 | Room Thermostat, Pneumatic, Single Setpoint, DA Heat/Cool, Celsius, 2-pipe | Siemens
193-215 | Room Tstat, Free Energy Band (TM), Pneumatic, DSP, DA, H/C, Deg F, 2-pipe | Siemens