Adjustable in the range from .05" + .02 W.C. to 12.0 + .1 W.C. May be used to sense low pressure or vacuum or differentials of pressure or vacuum. Typical applications are to prove blower operation in electric duct heater installations; to sense dirty filters; prove blower operation for humidifying; signal build-up of frost, operate Air Cleaners in Heat Pump Installation. Electrical Rating - 15 Amps, 125/277 VAC Resistive 1/4 H.P. 125 VAC, 1/2 H.P. 250 VAC, 300 VA 277 VAC, 490 VA @ 250 VAC, U. L. listed - File # MH-10196. Temperature Rating - 40+/- to 180+/- deg F. Standard individual package includes 1/4" Pressure Fittings suitable for use with copper or plastic tubing and 12" length of 1/4" plastic tubing.

1/4" Plastic Tubing is used from Air Flow Switch to Pilot Tube.