P-Series Pressure Switch

ASCO P-Series pressure switches consist of an open frame or enclosure protected switch unit and a transducer unit. They can be ordered separately for customer stocking and/or field assembly or as a complete factory-assembled unit. P-Series pressure switch units incorporate the unique ASCO TRI-POINT alternating fulcrum balance plate to control the operation of one or more electrical snapaction swtiches. The electrical snap-action switch together with the adjusting mechanism is a fully-tested, self-contained subassembly. Transducer unit incorporates a diaphragm/piston type pressure sensor, and is also a fully-tested, self-contained subassembly. When pressure is applied to the transducer it is converted into movement of the piston. This piston movement is then used to control the operation of the electrical snap-action switch in the switch unit. • Set point repeatability, +1% of operating range. • All wiring terminals, adjustments and visual scales are accessible from the front of the switch. • Choice of open frame type, general-purpose or watertight enclosure. • Choice of fixed, limited-adjustable or full-range adjustable deadband. • Choice of single or two-stage units. • Compact size. • Mounts in any position. • Rugged and vibration resistant; e.g., for compressors. • Visual adjustment scales in psig and bars. • Wide selection of transducer wetted materials suitable for air, water, oil or corrosive fluids. • Mix and match switch and transducer components for increased stock flexibility or to change pressure ranges in field.