Murphy 0-100 PSI Mechanical Pressure Swichgage with Snap-Switch for Pre-Alarm - A20PABS-100

The Murphy 0-100 PSI Mechanical Pressure Swichgage with Snap-Switch for Pre-Alarm A20PABS-100 is a diaphragm-actuated pressure-indicating gage with built-in electrical switch for tripping alarms and/or shutdown devices. This rugged, built-to-last instrument is face sealed from the environment by the unique combination of a polycarbonate case and lens, a polished stainless steel bezel and O-ring seals.

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 have self-cleaning motion to ensure electrical continuity.

The A20PABS-100 features a standard limit contact for equipment shutdown on low pressure. It also has an internal SPDT snap-switch to signal an alarm before shutting down. When the snap-switch trips (preset point), on falling pressure, the switch completes a circuit to activate an alarm. If the pressure continues to fall, the face-adjustable pointer contact will make and the shutdown circuit will be completed.

Applications includes: engines/equipment in Oil Field, Marine, Irrigation, Construction and Trucking Engines for Lube Oil Pressure, Water Pump Pressure, Hydraulic Pressure and Air Pressure.

FEATURES:

• 2 inch/51 mm dial
• Corrosion Resistant Polycarbonate Case
• Indicating Gage and Limit Switch
• Switch Can Activate Alarms and/or Shut Down Equipment
• Contact(s) Isolated From Ground
• Internal SPDT snap-switch for pre-alarm

PRODUCT SPECIFICATIONS:

• Part No.: A20PABS-100
  
• Range: 0-100 PSI 0-689 kPa
  
• Dial: White on black, dual scale; U.S.A. standard scale is psi/kPa
• Case: Polycarbonate/glass filled, corrosion-resistant; steel mounting clamp included
• Bezel: Polished stainless steel
• Pointer: Tempered nickel silver; Red tip
• 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, 2A@30 VAC/DC; Closed when the low limit is met. Open 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
• Wiring: Number 4 screw terminals
• Unit Weight: 8 oz. (0.23 kg)
• Unit Dimensions: 3 x 3 x 3 in. (76 x 76 x 76 mm)

Note: Actual image not shown. Same style only.