OTK Corporation
Industrial Equpment
Moscow - Almaty - Riga - Baku - Minsk - Erevan - Tbilisi - Bishkek -Tashkent - Ashgabat

100 Series

SIL2 Certified Pressure, Vacuum, Differential Pressure and Temperature Switches

The 100 Series is a cost-effective pressure and temperature switch for process plants and OEM equipment. The rugged, one piece enclosure features a slanted cover for wiring accessibility.

A wide variety of microswitch and process-connection options make this versatile series ideal for applications requiring a rugged weather-proof mechanical switch.

Typical applications that utilize the 100 Series are heat tracing, freeze protection, processing equipment (pumps, compressors), inputs for annunciator panels, and fire suppression systems.


  • SIL2 Certified Switch
  • 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 Vac to 344 bar
    • 0.2 “wcd to 500 psid
    • 0,5 mbar d to 34,5 bar d
    • -180 to 650 ºF
    • -117 to 340ºC
  • ​Approvals: UL, CSA, CE, TUV


  • UL listed and cUL certified.
  • ​CE compliant to low voltage directive and pressure equipment directive.
  • ​Optional ATEX or GOST intrinsic safety compliance
  • ​Single switch (SPDT or DPDT) output
  • ​Welded stainless steel diaphragm models
  • ​Ultra low pressure, “wc models
  • ​Optional sensor material for corrosive media
  • ​Polished stainless steel flushmount connection
  • ​Pump switch models with wide adjustable deadband

Technical Specifications

100 Series Pressure, Vacuum,
Differential Pressure and Temperature Switches

Installations Manuals


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