Siemens TH192S Reverse Acting Single Temperature Room Thermostat with One Pipe Non-Relay

The TH192 S thermostats are proportional single output, single set point, 1-pipe (low air capacity) or 2-pipe (high air capacity) temperature controllers. Each TH192 chassis includes a wall plate for thermostat installation using a variety of rough-in installation kits. Features: Maintenance-free with reversible motor. UL listed for plenum installations. Voltage or resistance signal input. Position output signal 0 to 10 Vdc. Mechanical spring returns the valve to its normal (fail-safe) position in power-off conditions (SQS65.5U actuator only).