Installing the Wrong Pressure Transmitter Can Be Dangerous

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Whether it's protecting human life, protecting expensive equipment, or meeting installation codes, safety is the number one concern when working in hazardous areas. This concern is particularly strong when there is a concentration of flammable gases, vapors, or dust. Many pressure transmitter users in refineries or chemical/petrochemical plants are unaware of the potential dangers of selecting the wrong pressure transmitter for their applications. Using the correct pressure transmitter can mean the difference between causing and preventing a fire or explosion.

A non-rated pressure transmitter can create severe safety issues for equipment and employees. Improper installation or use may damage the pressure transmitter, making it a possible ignition source. To help alleviate this concern, hazardous-area pressure transmitters are designed with explosion-proof fittings to minimize potential safety hazards. They are available in a variety of designs and approval ratings, including explosion proof, non-incendive, and intrinsically safe.

Hazardous-Area Pressure Transmitters

Explosion-Proof pressure transmitters are based on the theory of containment and are designed for applications requiring Class 1, Division 1 approvals. These pressure transmitters are designed to contain, control, cool, and vent any possible ignition, without igniting the surrounding flammable gases or vapors. They require installation with conduit and seal-offs to maintain the explosion-proof rating.

Non-Incendive explosion-proof pressure transmitters are preferred when potential hazards are only occasionally present. They are designed to work in Class 1, Division 2 hazardous areas and require less stringent installation procedures than explosion-proof pressure transmitters.

Intrinsically Safe explosion-proof pressure transmitters are designed to limit the thermal and electrical energy to a point where ignition is not possible. Intrinsically safe pressure transmitters require the use of an intrinsically safe barrier installed in the safe area. They do not require the use of conduit and conduit seals or need a "hot permit" if servicing of the instrument loop is required.

Why WIKA Makes a Difference

Over the past six decades, WIKA Instrument , LP has become a symbol for sophisticated solutions in the field of pressure and temperature measurement.

WIKA's family of hazardous-area pressure transmitters is suitable when pressure safety is a concern, but applications do not require the full functionality of smart pressure transmitters. WIKA's E-10, N-10 and IS-3 pressure transmitters all feature technology designed for use in hazardous locations. Features include pressure ranges of 30inHg vacuum to 15,000 psi; output signals of 4-20mA to 1-5v; and a variety of approvals. All are backed by a two-year warranty. 

Recommended WIKA Products for Hazardous Areas:

  • E-10: Class 1, Division 1 (explosion-proof)
  • N-10: Class 1, Division 2 (non-incendive)

Whatever your needs, WIKA cares about your safety and is ready to provide the right pressure transmitter for your hazardous-area applications.

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