Adjustable differential pressure sensors OsiSense XMP. OsiSense XMP pressure sensors for control circuits are used to monitor water pressure (both saltwater and freshwater) and air. The XMLC series pressure sensors feature an adjustable differential and are designed for regulation between two thresholds. Membrane pressure actuating element G 1/4 (socket) liquid connection type, 2 cable entries with threaded holes for PG 13.5 cable glands, 2 normally open contacts with a latching mechanism.