The Murphy PT167EX is a pressure Swichgage instrument connected to a threaded pressure diaphragm housing.

The Swichgage instrument is enclosed in an explosion-proof case and is CSA rated for Class I, Division 1, Groups C and D. A Swichgage instrument is a pressure-indicating gage with adjustable low and high pressure limit switches. When the gage pointer touches the low or high limit switches, an electrical circuit is completed which can operate alarms and/or shut down equipment. The 2 NPT, sealed diaphragm housing is attached directly to the Swichgage connection. The diaphragm housing is filled with a silicone fluid so that pressure against the diaphragm causes the Swichgage instrument to respond. The housing seals the Swichgage sensing element from the medium being measured. Applications include highly viscous liquids such as crude oil on lead line applications. Other applications have included asphalt, sludge, abrasive materials, etc.

  • CSA
How to Order Specifications Downloads

All configurations may not be available. Call your sales representative or Enovation Controls for more information. See sales bulletin for complete details and accessories.

Case: Explosion-proof, sand cast aluminum. Lens is removable. CSA Listed for Class I, Division 1, Groups C and D.

Contact Rating: 1 A, 125 VAC

Dial: 4-1/2 in. (114 mm) white on black, dual scaled psi/kPa. Other dial configurations available. Consult factory.

Ranges: See How to Order

Gage Accuracy: ±3% full scale

Process Connection: 2 NPT

Maximum Pressure: 30% overpressure

Diaphragm Housing: Plated steel, Ni-Span®; silicon filled

Diaphragm Fluid: Silicone 200

Shipping Weight: 16.5 lb (7.5 kg)

Shipping Dimensions: 12 x 12 x 9 in. (305 x 305 x 229 mm)

 WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information about California Propsition 65, go to or visit our California Proposition 65 page.

Additional product documentation can be found on our product support website or by clicking the Help Center button above.

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