PS10-1 POTTEReBayProduct Overview The PS10 1 is a pressure actuated switch engineered to detect waterflow conditions in a variety of automatic fire sprinkler system designs, including wet pipe systems with alarm check valves, as well as dry pipe, pre action, and deluge configurations. In addition to flow detection, it can function as a low pressure supervisory switch with an adjustable range from 4 to 15 PSI (0. 271. 03 BAR). Built with a die cast, NEMA 4 IP55