WIKA Pressure switch





  • Adjustable on site
  • Protection cap for switch point setting
  • Setting ranges:
    -0.4 ... +7 to 6 ... 30 bar
    -6 ...100 to 85 ... 425 psi
    -0.04 ... +0.7 to 0.6 ... 3 MPa
  • Electrical rating up to AC 230 V, 50/60 Hz, 10 A

The model PSM-520 is used in industrial control, monitoring and alarm applications. The switch point can be specified by the customer on site. The instrument can switch electrical loads of up to AC 230 V, 50/60 Hz, 10 A. The model PSM-520 pressure switch offers many application possibilities with non-corrosive media like oil, water and air.

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  • Pumps
  • Compressors

Pressure switch, heavy-duty version For superior industrial applications Model PSM-550


  • Non-repeatability ≤ 1 %
  • Setting ranges for vacuum, +/- and gauge pressure
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The PSM-550 is used in industrial control, monitoring and alarm applications. The switch point can be be specified by the customer on site. The instrument can switch electrical loads of up to AC 230 V, 10 A. The PSM-550 pressure switch offers many application possibilities with non-corrosive media like oil, water and air.

  • Pumps
  • Lubrication systems
  • Hydraulic systems
  • Autoclaves

Pressure switch mechanical for refrigeration applications With settable / fixed differential Model PSM-690


  • Robust mechanism
  • Auto or manual reset
  • Designed for use in refrigeration systems
  • No tools required to adjust the setpoint
  • Fail safe double ply bellow element for high pressure
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The PSM-690 is used in refrigeration control, monitoring and alarm applications. The switch point can be specified by the customer on site. The instrument can switch electrical loads of up to AC 230 V, 10 A. The PSM-690 pressure switch is specially designed for refrigeration applications.

  • Refrigeration compressors
  • Chillers
  • Driers
  • HVAC