Supco NS2000031

Supco Air Pressure Sensing Switch, Universal, 0.1 - 10 Inch WC, 14 Inch WC Maximum, SPDT, Barbed, 5 A, 277 VAC, 100000 Cycles, -40 to 190 deg F, 1/4 Inch x 0.032 Quick Connect, Glass Filled Polycarbonate Housing, Includes: Calibration Springs, Calibration Tool (Hex Wrench), Mounting Brackets and Orifice Flow

• The new universal air pressure sensing switch has field adjustable set points using the included adjustment tool
• The switch comes in a contractor kit that includes the hardware and replacement hose
• Robertshaw® air pressure sensing switches, this switch is NEMA rated and is practically insensitive to temperature change with an operating range of -40 to 190 deg F
• The available sensing probe kit works with the universal switch as well as the rest of the Robertshaw® air pressure switch products to provide a form fit extension from your air source to the switch, limiting the need to install the switch directly on the air source
• 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