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United Electric J120K-540-M405-M201-QC1 ATEX 120 Series Differential Pressure Switch (250 PA Falling)

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.


  • ATEX certified
  • One SPDT; epoxy coated enclosure; internal adjustment with no reference scale, dual conduits
  • Enclosure: Die cast aluminium, epoxy powder coated; gasketed; cover lock; internal set point lock as standard
  • Certified to enclosure type 4X. Class I, Division 1 product meets enclosure type 7; Class II, Division 1 product meets enclosure type 9. Certified to IP66 requirements
  • Electrical Connection: Two 3/4″ NPT E/C; terminal block standard
  • Buna N diaphragm and sealing diaphragms with aluminum 1/8” NPT (female) pressure connections
  • Adjustable Set Point Range: 0.2 to 7 “wcd (0,5 to 17,4 mbar)
  • Intrinsic safety compliance for European Union per ATEX standards
  • Factory set one switch – Setpoint is 250 PA Falling
  • Comes with Test Certificate
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