The A25P-30 Pressure Swichgage® is a 2.5" (64 mm) dial-style, diaphragm-actuated pressure indicating gauge with built-in electrical limit switches for triggering alarms and/or shutdown devices. This dual-scale gauge has a range of 0-30 psi.
The gauge mechanism is enclosed in a polycarbonate shatterproof housing and glass. A polished stainless steel bezel and o-ring seal help protect this rugged gauge from the outside environment. A unique one-piece diaphragm chamber ensures gauge accuracy and moderate overpressure protection.
A built-in pulsation dampener helps eliminate pointer shake and is removable for cleaning. Inside the A25P-30, a tempered nickel silver gauge needle both indicates pressure and acts as a switch pole, completing an electrical circuit when it contacts an adjustable limit contact. The contacts are self-cleaning to ensure electrical continuity. Designed for engine and equipment protection, the A25P-30 Pressure Swichgage® monitors engine lube oil pressure, water pump pressure, hydraulic and air pressure in applications such as oilfield, marine, irrigation, construction and trucking.

This popular instrument features a beryllium copper diaphragm sensing element and 1/8-27 NPTM brass process connections. Adjustable limit contacts are SPDT contacts; pilot operated only, 2A @ 30 VAC/DC; closes when lower limit is reached, opens when pointer is in normal operating range

A25P-30: 
2.5" Pressure Switch Gauge; 0-30 Psi (05704334)
0-30 PSI (0-207 kPa) pressure range (dual scale)
2 1/2" (64 mm) dial gauge
Corrosion-resistant polycarbonate housing
Switch can activate alarm and/or shut down equipment
Contacts isolated from ground