Schneider Electric's Square D Pumptrol 9013FHG2J27 is a compact electromechanical pressure switch that automatically turns a pump or compressor on and off in response to system pressure. It is designed for an 80-100 psi operating range (20 psi differential) with a single-port 1/4-inch NPSF connection and two normally closed contacts (2NC) across two circuits. The switch features a thermoplastic housing with a nitrile diaphragm and a NEMA 1/IP20 enclosure, rated for up to 220 psi and operating from -33 to 257°F. Its body measures roughly 2.78 in W x 3.76 in D x 2.8 in H.
