Supco Air Pressure Sensing Switch, Adjustable, 1.0 - 4.0 Inch WC, 0.1 Inch WC Differential, 14 Inch WC Maximum, SPDT, Barbed, 5 A at 120/277 VAC Non-Inductive, 5 A at 28 VDC Noninductive, 1 A at 120 VA Pilot Duty, 100000 Cycle, -40 to 190 deg F, 1/4 Inch Spade, Glass Filled Polycarbonate Housing, 4 Inch H x 3-1/4 Inch W x 2-1/8 Inch D, Includes: Adjustment Tool and Mounting Hardware
- All air switches come in a contractor kit that includes the hardware, replacement hose and an adjustment tool for easy installation and calibration
- These switches include features such as factory calibrated and factory fixed set points, NEMA rated housings, manual resets and gold contacts
- Select air pressure sensing switches are practically insensitive to temperature change with an operating range of -40 to 190 deg F
- Conditioned air filters that accumulate particulate matter used to sense the differential pressure or airflow drop across the filter
- Defrost cycle is initiated by sensing differential pressure or airflow drop across the refrigeration coils when they ice
- On gas fired units, the switch senses draft down from the blower; switch actuation allows ignition start-up or system shutdown upon insufficient draft
- On air-supported structures and enclosures, sensing switches ensure proper inflation or internal pressure switch actuation controls the blower to maintain pressure
- Exhaust fans and fume hoods employ switches to sense draft down from the exhaust fan switch actuation signals condition upon fan failure of insufficient draft
- Vertical mounting location
Standard/Approvals: CE, CSA, NRTL Certified, UL Listed
Application: Residential and Light Commercial
