Neodyn 142P8 NEMA 4X, 7, 9 & 13 Pressure Switch – Hazardous Area

Neodyn 142P8 NEMA 4X, 7, 9 and 13 Pressure Switch is a specialized instrument designed for ultra-low pressure and vacuum to pressure crossover applications. Engineered for critical performance in hazardous environments, this switch features a unique construction that combines high sensitivity with high proof pressure capabilities, ensuring durability even in volatile systems.

Description

Neodyn 142P8 NEMA 4X, 7, 9 and 13 Pressure Switch offers a robust solution for complex pressure monitoring tasks where standard switches fail. It bridges the gap between vacuum sensing and positive pressure detection, making it an invaluable tool for crossover applications.

Nega-Rate® Technology for Stability Reliability in low-pressure applications is critical. The 142P8 utilizes the proprietary Nega-Rate® Belleville disc spring. This snap-action mechanism ensures that the switch actuates decisively at the set point, providing stable and repeatable performance. It effectively resists mechanical vibration and shock, reducing false alarms and maintenance needs in active industrial plants.

Hazardous Area Protection Safety is a primary design feature of the 142P8. The unit is housed in an enclosure rated for NEMA 4X, 7, 9, and 13, offering comprehensive protection against corrosion, explosive gases, combustible dusts, and water ingress. The electrical assembly is snap-action and fully listed by Underwriters’ Laboratories, Inc., FM Approval, and CSA International, guaranteeing compliance with strict safety regulations.

High Proof Pressure One of the distinct advantages of the 142P8 series is its ability to handle high proof pressures despite its sensitivity to ultra-low pressure changes. This robust construction protects the sensing element from system surges that would typically damage delicate low-pressure instruments, ensuring a long operational lifespan.

Brand

Neodyn

Neodyn

ITT Neo-Dyn® is a leading manufacturer of high quality and reliable industrial switches. Our compact adjustable switches, pressure switches, hazardous area switches, vacuum switches, and temperature switches support a variety of applications throughout the world. Our legacy of competitively priced products and on time delivery, guarantee that you have the proven performance in the product that you need to support your specific requirements when you need it most. With a strong focus in the aerospace, general industrial, energy and chemical markets, we are your first choice for all of your switch product needs.

Specifications

  • Electrical: Snap action electrical switch listed by Underwriters’ Laboratories, Inc., FM Approval  and CSA International
  • Electrical Connection: 1/2 NPT male conduit connection with PVC insulated 18 AWG, 18” long leads
  • Pressure Connection: 1/2 NPT Female
  • Temperature Range*
    • Ambient: -40°F to +180°F (-40°C to +82°C)
    • Media: -50°F to +250°F (-46°C to +121°C)
  • Adjustment: Concealed wrench flat adjustment with range scale
  • Shipping Weight: Approximately 3.5 pounds

*Temperature limits change with O-Ring selection. See Electrical Assembly specification sheet for Temperature Class Ratings.

Features

  • Crossover Capability: Designed for ultra-low pressure and vacuum to pressure crossover applications.
  • Nega-Rate® Technology: Belleville disc spring ensures superior set point stability and vibration resistance.
  • Hazardous Location Rated: Explosion-proof enclosure meets NEMA 4X, 7, 9, and 13 standards.
  • High Proof Pressure: Unique construction protects against system pressure surges.
  • Corrosion Resistance: Wide range of wetted materials available for harsh media.
  • Secure Adjustment: Concealed wrench flat adjustment mechanism with a visible range scale.

Applications

Neodyn 142P8 NEMA 4X, 7, 9 and 13 Pressure Switch is ideal for specialized applications in demanding sectors:

  • Chemical Processing: Monitoring reactor pressures in corrosive and explosive environments.
  • Oil & Gas Refineries: Controlling vapor recovery units and low-pressure hydrocarbon lines.
  • Vacuum Systems: Monitoring vacuum-to-pressure transitions in industrial processes.
  • Ventilation Control: Ensuring proper airflow in hazardous area ducting.
  • Tank Blanketing: Regulating low-pressure gas blankets in storage vessels.