1340101 Switch

Potter PS40-1 is a robust, single-pole, double-throw (SPDT) pressure supervisory switch for automatic fire sprinkler systems, designed to detect decreases or increases in system pressure in dry pipe, pre-action, and deluge systems, or to supervise air/water supplies. It features a durable die-cast enclosure (NEMA 4/IP66 rated) for indoor/outdoor use, 1/2″ NPT connection, and operates in the 10-60 PSI range, triggering an alarm or signal at a set pressure drop (e.g., 30 PSI).