The Potter® PS40 Series supervisory pressure actuated switches are designed primarily to detect an increase and or decrease from normal system pressure in automatic fire sprinkler systems. Typical applications are dry pipe systems, pre-action air/nitrogen supervision, pressure tanks, air supplies and water supplies. The PS40 switch is factory set for 40 PSI normal system pressure. The switch marked with the word LOW is set to operate at a pressure decrease of 10 PSI at 30 PSI. The switch marked with the word HIGH is set to operate at a pressure increase of 10 PSI at 50 PSI.

POTTER® PS40 Supervisory Pressure Switch, 125/250 VAC, 30 VDC, 10.1 A at 125/250 VAC, 2 A at 30 VDC, Composite/Die Cast, Industry Standards: cULus Listed, CE Marked, FM Approved, LPCB, Additional Specifications: Temperature Range: -40 - 140 DEG F, Pressure Range: 10 - 60 PSI

• Independent switch adjustment on two switch models, no tools needed
• Two 1/2 IN conduit/cable entrances
• Separate isolated wiring chambers
• Non-corrosive pressure connection
• Non-conductive enclosure

• Specification Name https://macombstage.cimm2.com//ASSETS/DOCUMENTS/ITEMS/EN/POTSWITCHPS402_Spec.pdf