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Murphy 0-300 PSI Water Pressure Swichgage 20PW-HLK-300

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Murphy 0-300 PSI Water Pressure Swichgage 2 in. with Knob Adjusting Face Contact and High/Low Contacts - 20PW-HLK-300

Product Condition: NEW
Murphy Water Pressure Swichgage 300 PSI with Plated Steel Case 20PW-HLK-300
Estimated ship date: for orders by 3pm PT/6pm ET today Available for back order.

SSL Cerficate

The Murphy 0-300 PSI Water Pressure Swichgage 2" with Knob Adjusting Face Contact and High/Low Contacts 20PW-HLK-300 is a diaphragm-actuated pressure-indicating gage with a built-in electrical limit switch. This swichgage is used for tripping alarms and/or shutdown devices. The gage mechanism is enclosed in a steel case coated to resist corrosion. A polycarbonate, break-resistant lens and a polished, stainless steel bezel help protect this rugged, built-to-last instrument. Accuracy and protection from moderate overpressure is assured by a unique, unitized diaphragm chamber. A built-in pulsation dampener helps eliminate pointer flutter and is removable for cleaning.

The gage pointer acts as a pressure indicator and as one switch pole which completes a circuit when it touches the adjustable limit contact. Contacts are grounded through the case and have a self-cleaning motion to ensure electrical continuity. Specifically designed to protect engines and equipment in oil field, marine, irrigation, construction and trucking applications to monitor water pump pressure. Exceeds SAE standards.




  • 2 inch/51 mm Dial
  • Steel Case Coated to Resist Corrosion
  • Polycarbonate, Break-Resistant Lens
  • Polished, Stainless Steel Bezel
  • Combination Indicating Gage and Limit Switch
  • Switch Can Activate Alarms and/or Shutdown Equipment
  • Exceeds SAE Standards
  • K = Knob Adjusting Face Contact
  • HL = High and Low Contacts



  • Part No.: 20PW-HLK-300
  • Range: 0-300 psi (2.1 MPa kPa) [20 bar]
  • Maximum Pressure: 1-2/3 x scale
  • Standard Settings: 75 psi (517 kPa) [5.0 bar]
  • High Settings: 225 psi (1.6 MPa) [15 bar]
  • Dial: White on black, dual scale; U.S.A. standard scale is psi/kPa
  • Case: Plated steel; mounting clamp included (except for direct mount models)
  • Bezel: Polished stainless steel
  • Lens: Polycarbonate, high-impact
  • Oil: Silicon Oil
  • Temperature Range: Ambient: -40°F (-40°C) thru 150°F (66°C); Process: -40°F (-40°C) thru 250°F (121°C)
  • Process Connection: 1/8-27 NPTM brass
  • Sensing Element: Beryllium copper diaphragm
  • Adjustable Limit Contact: SPST contact; pilot- duty only, 2 A @ 30 VAC/DC; Normally Close (NC) when the low limit is met. Normally Open (NO) when pointer is in normal operating range. Contacts are gold flashed silver
  • Limit Contact Adjustment: by a 1/16 in. hex wrench thru 100% of the scale
  • Limit Contact Wire Leads: 18 AWG (1.0 mm2) x 12 in. (305 mm)
  • Unit Weight: 8 oz. (0.23 kg)
  • Unit Dimensions: 3 x 3 x 3 in. (76 x 76 x 76 mm)




Additional Information

Product Condition NEW
upc No

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