Air Sensing Switch HVAC/General Purpose Differential (In. WC) 0.02 to 0.3 SPDT Switch Type Pressure Setting Range (In. WC) 0.12 to 5.0 Electrical Rating 300 VA Pilot Duty Sample Line Connector Barbed Height (In.) 4 1/4 in Width (In.) 3 3/4 in Depth (In.) 2 3/4 in Mounting Holes O.C. (In.) - - Operating Temp Range (F) -40 to 180 - Features - Senses Positive Negative Or Differential Air Pressure Or When Extreme Low Temperature Or Pressure Is A Critical Factor