FW Murphy, 5700430, A25DP Series Differential Pressure Gage for Filter Restriction, 0-30 Psi
Instrument is diaphragm-actuated, differential pressure-indicating gage with a builtin electrical switch. This switch is used for tripping alarms and/or shutting down equipment. The gage is 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 mechanism is enclosed in a steel case coated to resist corrosion. A polycarbonate case sealed from the environment. Featuring a polycarbonate, break-resistant lens and polished stainless steel bezel to help protect the 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.
Features:
- Constant visual indication of the condition of your filter is shown on the dial.
- Two instruments in one with an accurate indicating gage and adjustable p.s.i.d. limit switch reduces inventory and installation time.
- Adjustable contact lets you set the monitoring range of the gage. The contact is tamper proof and can be set only with a 1/16 Allen-head wrench.
- Made of durable materials allowing them to withstand rugged applications.
- Early filter changes cost you money and increase the risk of contaminants entering the system. The filter restriction instrument will let you know when to change the filter and maintain peak efficiency.
For more information, please see 
Data Sheet
