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United Electric 12 Series Explosion Proof Pressure / Temperature Switch

ABLE Instruments are the authorised representative for United Electric (UE) in the UK, including the UE 12 Series range of explosion proof, dual seal, 316 stainless steel, vibration resistant pressure, vacuum, differential pressure and temperature electromechanical switches. A compact, cylindrical design provides installation flexibility for process equipment or control panels.

The United Electric 12 Series offers process end-users and OEMs, safety and control reliability in a rugged, compact design for alarm and emergency shutdown applications. Quadruple approvals (UL, cUL, ATEX and IECEx) mean the 12 Series meets the demanding requirements of critical applications within hazardous locations. Additionally, the UE 12 Series complies with ANSI/ISA 12.27.01, “secondary seal requirements for process sealing between electrical systems and flammable or combustible process fluids,” and NEC 501.17, “process sealing.” It can be used in a variety of applications where space is at a premium. Metal wetted parts comply with NACE MR0175 and the 316 stainless steel, type 4X enclosure rating assure long-term performance in the harshest environments. Furthermore, SIL 2 certification simplifies use in safety instrumented systems (SIS). Typical applications that utilise the UE 12 Series include offshore production safety panels, rotating equipment, fire suppression systems, BOP accumulator systems, and CO2 injection skids.

Have a particular application / project in mind? We’d welcome a call on +44 (0) 1189 169 420, or email us now at [email protected]

At the heart of the United Electric 12 Series is a Belleville spring assembly. The spring is a small conical washer that transfers motion to a hermetically sealed 1- or 5-amp microswitch. Its ‘snap-action’ provides fast, positive contact transfer. The Belleville spring ‘snaps over’ when pressure is applied and ‘snaps back’ upon pressure release. This disc sensor assembly is resistant to vibration, reduces spurious trips and improves set point stability.


  • UL, cUL, ATEX and IECEx approved for Div. 1 or Zone 1 hazardous locations; CE compliant
  • Dual seal compliant to ANSI/ISA 12.27.01 & NEC 501.17
  • Many models compliant to NACE MR0175
  • Snap acting Belleville spring for long life, vibration resistance and stability
  • Optional Hastelloy and Monel sensor material for corrosive media
  • Mounting bracket for retrofit applications
  • 72” leadwires
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Price: POA Contact 247ABLE