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Providing proportional, single output, dual setpoint, 2-pipe pneumatic room temperature control, the 193 HC Powerstar (Hesitation) Free Energy Band Heating/Cooling Pneumatic Room Thermostat is designed to sequence a heating device or a cooling device. The hesitation feature keeps the output pressure constant through a 6°F (10.8°C) range (typical), causing a deadband.


The 193 HC Powerstar (Hesitation) Free Energy Band Heating/Cooling Pneumatic Room Thermostat is an excellent choice for saving energy by sequencing heating and cooling valves. In most heat/cool pneumatic applications, a 3 to 8 psi (21 to 55 kPa) heating valve and a 10 to 14 psi (69 to 103 kPa) cooling valve is used. By design, this provides a 2 psi (14 kPa) deadband where no heating or cooling is occurring. The hesitation feature allows you to change the deadband range to a 3, 4 or 5 psi (21, 28, or 34 kPa) range to save energy. Refer to the Input/Output chart below for more information.

  • Dual setpoint dials available in Fahrenheit or Celsius scales
  • Sensitive bimetal responds to temperature changes
  • Integral, field adjustable limit stops
  • Adjustable Free Energy Band
  • Wall mounting plate for connection to a variety of rough-in terminal boxes included
  • Test port for fast check of output pressure without removing the cover
  • Field replaceable thermometer, setpoint dials, restrictors, and filters
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Manuals (1)
Product Type:
Pneumatic Thermostat
Temperature Range (F):
45°F - 85°F
Direct Acting
Fan Coil
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