POTTER PS40-1eBayProduct OverviewThe PS40 1 is part of Potters PS10 Series of pressure actuated switches, engineered to detect waterflow conditions in various fire sprinkler system configurations, including wet pipe systems with alarm check valves, dry pipe, preaction, and deluge systems. It can also function as a low pressure supervisory switch, with an adjustable range between 4 and 15 psi (0. 271. 03 BAR). Built with a durable die cast enclosure and designed