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Potter PS25-2 Low/High Supervisory Pressure Switch for Low Differential Dry and Pre action Valves - Nominal System Pressure 25 psi The Potter PS25 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: air/nitrogen supervision in dry pipe and pre-action systems, pressure tanks, air supplies, and water supplies. The PS25-2 has two switches. The Low switch is factory set to activate at approximately 18 psi (1,2 BAR) on a decrease in pressure.
The High switch is factory set to activate at approximately 28 psi (1,9 BAR) on an increase in pressure. NFPA 72 requires a supervisory signal for both high and low pressure conditions. The PS25 is factory set for a normal air pressure of 23 psi. See section heading Adjustments and Testing if other than factory set point is required.
Main Features
Two switch model
Independent switch adjustment, no tools needed
Two 1/2" conduit/cable entrances
Separate isolated wiring chambers
Non-corrosive pressure connection
Non-Conductive Enclosure
VdS version available
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