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ASCO™ Series P Pressure Switches
The ASCO Series P pressure switches consist of an open-frame or enclosure-protected switch and a transducer unit.
They can be ordered separately for customer stocking and/or field assembly or as a complete factory-assembled unit. ASCO P Series switches incorporate the unique ASCO TRI-POINT alternating fulcrum balance plate to control the operation of one or more electrical snap-action switches. The pressure switch and transducer unit are fully-tested, self-contained subassemblies.
ASCO™ Series P Pressure Switches


Standards / Regulations
CSA, Type 1, Type 4, UL, Type 3S
Pipe / Port Size
1/2 "; 1/4 "


  • Field-adjustable set points
  • Fixed deadband
  • Choice of open-frame, general-purpose, or watertight enclosures
  • Small size mounts in any position
  • Rugged and vibration-resistant construction is built for challenging applications, e.g. compressors
  • Visual adjustment scales in psig and bar