We offer the most competitive prices for HVAC Heating Cooling Air Conditioning products and installation in Arlington – Alexandria – Northern Virginia – Washington DC and Maryland
HVAC Sensors 33CSENTHSW Carrier

Call Perry Aire today 703-521-2226!

Enthalpy Switch/Receiver

The accessory enthalpy switch/receiver measures both temperature and humidity and converts the data into a relay output dependent on the sensor mode. Mode 1 is designed to energize the relay at a fixed set point of 28 BTU/lb or 75 F.



VIRGINIA: Alexandria, Annandale, Arlington, Ashburn, Burke, Centreville, Chantilly, Crystal City, Dale City, Dulles, Fairfax, Falls Church, Fort Belvoir, Great Falls, Herndon, Leesburg, Lincoln, Lorton, Manassas, McLean, Oakton, Purcellville, Reston, Springfield, Stafford, Sterling, Vienna, Woodbridge.

MARYLAND: Annapolis, Aspen Hill, Beltsville, Bethesda, Chevy Chase, College Park, Gaithersburg, Hampstead, Hyattsville, Lanham, Laurel, Montgomery Village, Potomac, Rockville, Silver Spring, Takoma Park, Temple Hills, National Harbor, Cabin John, East Riverdale, Riverdale, Landover, Cheverly, Oxon Hill, Fort Washington, Indian head, Morningside.


HVAC – Heating – Air Conditioning Repair Experts at Perryaire.


  • Advanced technology ceramic design enables sensors to recover fully from condensation
  • Sensor maintains accuracy longer than conventional sensors
  • Accuracy is maintained over the entire operating range by using temperature compensation
  • Precise production tolerances allow sensor interchangeability
  • Each sensor is tested to work at numerous points
  • 2-year limited factory warranty

Operating range of -40 to 140°F (-40 to 60°C) and 0-100% RH non condensing

Enthalpy range of 0 to 50 Btu/lb

Enthalpy accuracy of +/- 1Btu/lb at 77°F (25°C)