United Electric Controls 120 Series Pressure and Temperature Switches

Explosion-proof SPDT/DPDT and multi-switch output for control and safety applications

Heavy industrial processes rely on 120 Series pressure and temperature switches to protect equipment and personnel while preserving process uptime. The 120 Series is simple to install in hazardous location areas and perform critical alarm, safety and emergency shutdown functions. As an electromechanical switch, it can safely operate independently of the control system and switch reliably when needed, free from potential communication errors or cyber concerns.

Typical applications that utilize the 120 Series include rotating equipment such as pumps, turbines, and compressors, heat tracing, combustion systems, and oil, gas and chemical processing.

Features
  • SIL 2 certified (SIL 3 capable) switch providing reliable local switching of final element in safety instrumented systems (SIS)
  • Simplified installation with ample access to wiring compartment, terminal block, and set point adjustment
  • Protect piping and vessels with heat trace/freeze protection temperature models
  • Application versatility achieved through a variety of ranges, microswitches, sensors and process connections
120 Series

35 items

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  • Qty in Cart
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  • United Electric 120 Switches H122-552
    H122-552

    United Electric Controls

    Product Type: General Purpose Switches

    United Electric Controls H122 Pressure Switch, 30" Hg Vac-20 psi setpoint range, two SPDT, 15A@125/250/480 VAC, 3/4" FNPT elect. conn., NEMA 4X, 7 & 9 encl., Teflon diaph. and o-ring, 1/4" FNPT 316SS press. conn., external adjust. w/ref. dial
    Qty in Cart: 0
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  • United Electric 120 Switches H122-376
    H122-376

    United Electric Controls

    Product Type: General Purpose Switches

    United Electric Controls H122 Pressure Switch, 0-500 psi setpoint range, two SPDT, 15A@125/250/480 VAC, 3/4" FNPT elect. conn., NEMA 4X, 7 & 9 encl., 316LSS bellows, 1/4" FNPT SS press. conn., external adjust. w/ref. dial
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  • United Electric 120 Switches H122-361
    H122-361

    United Electric Controls

    Product Type: General Purpose Switches

    United Electric Controls 120 Series explosion-proof vacuum and pressure switches are approved for Class I and II, Div. 1 & 2 explosive and corrosive atmospheres. Available in a choice of sensors, ranges, switch configurations, process connections,...
    Qty in Cart: 0
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  • United Electric 120 Switches H122-358
    H122-358

    United Electric Controls

    Product Type: General Purpose Switches

    United Electric Controls H122 Pressure Switch, 0-200 psi setpoint range, two SPDT, 15A@125/250/480 VAC, 3/4" FNPT elect. conn., NEMA 4X, 7 & 9 encl., 316LSS bellows, 1/4" FNPT press. conn., external adjust. w/ref. dial
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  • United Electric 120 Switches H121K-S147B-M210
    H121K-S147B-M210

    United Electric Controls

    Product Type: General Purpose Switches

    United Electric Controls H121K Differential Pressure Switch, 3-30 psid setpoint range, one SPDT, 15A@125/250/480 VAC, 3/4" FNPT elect. conn., NEMA 4X, 7 & 9 encl., welded 316LSS bellows, 1/2" FNPT SS press. conn., differential pressure indicator,...
    Qty in Cart: 0
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  • United Electric 120 Switches H121-S164B
    H121-S164B

    United Electric Controls

    Product Type: General Purpose Switches

    United Electric Controls H121 Pressure Switch, 0-200 psi setpoint range, one SPDT, 15A@125/250/480 VAC, 3/4" FNPT elect. conn., NEMA 4X, 7 & 9 encl., welded 316LSS bellows, 1/2" FNPT SS press. conn., external adjust. w/ref. dial
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  • United Electric 120 Switches H121-S146B
    H121-S146B

    United Electric Controls

    Product Type: General Purpose Switches

    United Electric Controls H121 Pressure Switch, 0-30 psi setpoint range, one SPDT, 15A@125/250/480 VAC, 3/4" FNPT elect. conn., NEMA 4X, 7 & 9 encl., welded 316LSS bellows, 1/2" FNPT SS press. conn., external adjust. w/ref. dial
    Qty in Cart: 0
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  • United Electric 120 Switches H122-612-M415
    H122-612

    United Electric Controls

    Product Type: General Purpose Switches

    United Electric Controls H122 Pressure Switch, 200-3000 psi setpoint range, two SPDT, 15A@125/250/480 VAC, 3/4" FNPT elect. conn., NEMA 4X, 7 & 9 encl., 303SS piston and Buna N o-ring, 1/4" FNPT 303SS press. conn., external adjust. w/ref. dial
    Qty in Cart: 0
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