FW Murphy 05700387 20DP-30 Differential Pressure Gauge, Range 30 PSI

Features:

• Monitors Engine Oil and Fuel Filters
• Actuates Alarm or Shutdown System When Filter Becomes Clogged
• Combination Indicating Gage and Limit Switch
• Actuates Filter Backwash
• Signals Coolant Loss or Aeration On Engine Water Pump

The 20DP (2 inch / 51 mm dial) Swichgage instruments are diaphragm-actuated, differential pressure-indicating gages, with a built-in electrical switch. This switch is used for tripping alarms and or shutting down equipment. These gages are intended to monitor and indicate oil, fuel or water filter restriction and can reduce the risk of dangerously high pressure which may rupture the filter, resulting in contaminants entering the system. The 20DP series mechanism is enclosed in a steel case coated to resist corrosion. The A20DP series have a polycarbonate case and are sealed from the environment. All feature a polycarbonate, break-resistant lens and a polished, stainless steel bezel to help protect these rugged, built-to-last instruments. 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.