The POTTER-AMSECO-PS-10-2 Series Pressure Actuated Switch is designed for the detection of a waterflow condition in automatic fire sprinkler systems of particular designs such as wet pipe systems with alarm check valves, dry pipe, preaction, or deluge valves.The PS-10-2 equipped with two sets of SPDT contacts, is also suitable to provide a low pressure supervisory signal; adjustable between 4 and 15 psi. Also known as -Potter Electric Signal Mfg Us WATERFLOW PRESSURE SWITCH - PL-PS102