400 Series

Pressure switch, vacuum switch, and temperature switch models for threshold protection and control

The 400 Series is a versatile family that includes vacuum switch, pressure switch, differential pressure switch, and temperature switch models for applications that require single or multiple switching capabilities. Dual- and triple-switch versions provide multi-output for alarm and shutdown, pre-alarm and alarm, high/low limit, or level staging functions.

A wide variety of microswitch and process connection options, along with weather-tight enclosures, make the 400 Series an ideal choice for most ordinary location applications. Its worldwide use is assured with approvals and certifications to agency standards.

Widely used throughout the process industries, 400 Series vacuum switch, pressure switch, differential pressure switch, and temperature switch products provide threshold protection and control for many critical functions. Typical installations are found in industrial gas production; energy generation including pumps, turbines, and compressors; pulp and paper; and water and wastewater treatment.


  • Rugged, NEMA 4X, epoxy coated enclosure
  • ​SPDT or DPDT switch output
  • ​Easy access wiring
  • ​Single switch output
  • ​Internal reference scale and adjustable deadband available
  • ​Adjustable ranges:
    • 30 “Hg Vac to 5000 psi
    • -1 bar to 344 bar
    • 0.2 “wcd to 500 psid
    • 0,5 mbar to 34,5 bar
    • -120° F to 650° F
    • -85° C to 340° C
  • ​Approvals: UL, CSA, CE, FM
  • ​UL listed and cUL certified
  • ​CE compliant to low-voltage directive and pressure equipment directive
  • Optional ATEX or EAC intrinsic-safety compliance
  • ​​Welded stainless-steel bellows models
  • ​Ultra-low pressure, “wc models
  • ​Optional sensor material for corrosive media


Visit our Certifications Page for all 400 series Certifications

  • ​UL listed and cUL certified. FM approved.
  • ​CE compliant to low voltage directive and pressure equipment directive.
  • ​Optional ATEX or GOST intrinsic safety compliance.
  • ​One, two or three switch outputs may be separated up to 100% of range.
  • ​Wide variety of available options and pressure sensor modules.
  • ​Most models available for immediate delivery

Installations Manuals


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