gas pressure switch / for liquids / diaphragm / for hydraulic applications
J205LG High Pressure NEMA 4 Switch Whitman Controls Corporation



  • Fluid:

    for gas, for liquids

  • Technology:


  • Applications:

    for hydraulic applications, industrial, OEM, for the petrochemical industry, for the chemical industry, for compressors, for pumps, HVAC, for marine applications

  • Other characteristics:

    compact, stainless steel, rugged, high-pressure, low-pressure, screw-in, IP65, IP67, IP66, IP54, IP68

  • Process temperature:

    Min.: -65 °F (-54 °C)

    Max.: 225 °F (107 °C)

  • Pressure range:

    Min.: 0.8 psi

    Max.: 5,000 psi


The Whitman Controls J205LG NEMA 4 High Pressure Low Set Point Pres¬sure Switches are among our most versatile offering, affording the end user an extensive operating environment and a wide range of set point optionality. These switches can be exposed to high pressure without compromising integrity or switch functionality. The J205LG is the NEMA 4 rated weather-proof, liquid-resistant version of the J205G, suitable for outside applications or in areas of condensing humidity. Uses include gas bottle change switches and oil or water supply control. The internals are stainless steel with a diaphragm o-ring that is available in numerous compounds such as Buna (standard), Viton, Neoprene and Kalrez.

Key Features:
• Overpressure feature, allowing the switch to be subject to high pressure without compromising integrity
• Weather-proof and liquid-resistant
• NEMA 4 Rated
• Set point options: Factory set to cus-tomer specification, non-adjustable
• Extensive operating temperature range
• Wide range of electrical interfaces available
• SPDT or SPST availability
• Wide range of set point optionality

• Set point range: 0.80 to 800 PSIG
• Max System pressure: 5,000 PSIG
• Temperature range: -65oF to +225oF (-54oC to +107oC)
• Amps: 5 Amps Max
• Sensor Element: Diaphragm
• Weight: 4.0 oz (approx.)
• Cycling: Not to exceed 100 CPM
• Wetted Parts:
Diaphragm: 316 Stainless steel
Seal: Loctite #271
Body / Fitting: 303 Stainless steel
O-Ring: Buna N Standard, special materials available upon request