PS40-2 POTTER

Product Overview

 The PS40-2 is a supervisory, pressure-actuated switch designed to monitor increases or decreases from standard system pressure in fire sprinkler applications. Ideal for dry pipe systems, pre-action air/nitrogen supervision, pressure tanks, air supplies, and water supplies, the unit is factory-calibrated for a nominal system pressure of 40 PSI (2.8 BAR).

This dual-switch model provides independent high and low pressure monitoring: the LOW switch activates at a 10 PSI (0.7 BAR) drop to 30 PSI (2.1 BAR), while the HIGH switch activates at a 10 PSI (0.7 BAR) rise to 50 PSI (3.5 BAR). The device features a non-corrosive pressure connection, non-conductive enclosure, two wiring chambers, and dual ½" conduit entries.

It is UL, cUL, CSFM Listed and FM/LPC Approved, with a NEMA 4/IP55 enclosure suitable for indoor or outdoor environments when used with proper fittings. The PS40-2 includes two SPDT Form C contacts and supports systems operating between 10–60 PSI (0.7–4.1 BAR), with a maximum system pressure of 300 PSI (20.68 BAR).

Key Features

• Dual SPDT Form C switches with independent high/low pressure adjustment
• Factory-set operation:
   • Low activation at 30 PSI (2.1 BAR)
   • High activation at 50 PSI (3.5 BAR)
• Suitable for dry pipe, pre-action, deluge, and waterflow supervisory applications
• Non-corrosive ½" NPT nylon pressure connection and non-conductive enclosure
• Two ½" conduit knockouts with isolated wiring chambers
• NEMA 4/IP55 rated enclosure for indoor/outdoor use
• Switch rating: 10.1A at 125/250 VAC, 2A at 30 VDC
• Operating pressure range: 10–60 PSI (0.7–4.1 BAR)
• Maximum system pressure: 300 PSI (20.68 BAR)
• Temperature range: –40°F to 140°F (–40°C to 60°C)
• Tamper-resistant cover with supplied key