Alutal Measure & Trust

120 Series

SIL2 Certified Rugged, explosion-proof pressure, vacuum, differential pressure and temperature switches As safety requirements become more stringent, the determining factor in specifying an industrial pressure, differential pressure and/or temperature switch rests upon that switch protecting equipment, processes and personnel. Meeting hazardous location requirements through worldwide approvals and certifications, UE’s 120 Series is the choice where potentially explosive or highly corrosive atmospheres exist.

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The product

The 120 Series offers a variety of pressure, vacuum, differential pressure and temperature ranges, as well as process connections, wetted materials and sensor types. With a common flexible platform, models can quickly be adapted at the factory for special requirements, such as ranges, process connections and electrical ratings. Typical industries using 120 Series switches include chemical, petrochemical, refinery, oil and gas production and transmission, and pharmaceuticals.


  • SIL2 Certified
  • Class 1, Divisions 1 & 2, Zone 1
  • UL listed, cUL certified, ATEX flame-proof & CE (LVD, PED) compliant; other worldwide hazardous location approvals available
  • Dual electrical conduit openings provide mounting flexibility while terminal block provides ease of wiring
  • SPDT, DPDT, or dual SPDT switch output of pressure sensor materials, including welded stainless steel diaphragms and bellows
  • Internal or external set-point adjustment
  • Heat trace & freeze protection temperature models
  • Adjustable set-point ranges:
    • Pressure & Vacuum: 30 ”Hg Vac to 6000 psi
      1 to 413,7 bar
    • Water Column: 300 “wc Vac to 250 “wc
      -746,7 to 622,3 mbar
    • Differential Pressure: 0.2 “wcd to 500 psid
      0,5 mbar to 34,5 bar
    • Temperature: -180 to 650 ºF
      -117.8 to 343.3 ºC


  • Standard product approvals include cULus, ATEX & IECEx
  • Optional approvals for Russia, Ukraine and China
  • Internal adjustment hex or external adjustment via calibrated dial(s) with tamper resistant cover
  • Integral cover lock
  • SPDT, DPDT or dual SPDT output
  • Wide variety of sensor materials
  • Optional Hastelloy® and Monel® sensor material for corrosive media
  • Wide adjustable deadband models
  • Flush mount sensors
  • Heat tracing temperature models
  • Most models available for immediate delivery!
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