Pressure Sensing Switch, HVAC/General Purpose, Differential (In. WC) 0.02 to 0.8, SPDT Switch Type, Pressure Setting Range (In. WC) 0.05 to 12.0, Electrical Rating 300 VA Pilot Duty at 115 to 277V AC, 15 amps Noninductive to 277V AC, Sample Line Connector 1/4 in Slip-On, Height (In.) 5 13/16 in, Width (In.) 3 1/4 in, Depth (In.) 2 7/8 in, Mounting Holes O.C. (In.) 3 7/8 in, Vertical, Operating Temp. Range (F) -40 to 180, HVAC and Energy Management