LIMIT CONTROLLER, 20-300 PSI OPERATING PRESSURE RANGE, MANUAL RESET, SPST SWITCH BREAKS ON PRESSURE RISE, STAINLESS STEEL DIAPHRAGM, USE WITH STEAM, AIR, NONCOMBUSTIBLE GASES, & NON CORROSIVE FLUIDS, 1/4" INTERNAL THREAD OR SURFACE MOUNT, 120VAC/240VAC