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

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.

FEATURES:

• 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

PRODUCT SPECIFICATIONS:

• 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)