300 Psi Pressure Gauge

The AUTOMETER 300 PSI Pressure Gauge (Part Number 5423) is a mechanical analog instrument designed for direct pressure monitoring in hydraulic, pneumatic, and fluid systems. This 2-5/8 inch diameter gauge delivers accurate real-time readings across a 0–300 psi range, making it essential for equipment diagnostics, maintenance, and operational safety across industrial, automotive, and tactical applications.

The liquid-filled design protects internal components from vibration, shock, and environmental contamination—a critical feature in field conditions where equipment is subject to rough handling and variable temperatures. The 1/8 inch NPT port accepts standard hydraulic fittings and allows straightforward integration into existing pressure circuits. The black face with white markings provides high contrast readability under both bright daylight and low-light conditions, essential for rapid pressure assessment during equipment operation or troubleshooting. As a mechanical gauge with no electronic components or power requirements, it delivers reliable operation in electromagnetic environments and extreme temperatures where electronic sensors may fail.

This pressure gauge serves mechanics, hydraulic technicians, equipment operators, and maintenance personnel who require direct, immediate pressure feedback without dependency on external power or wireless connectivity. It is particularly valuable in mobile equipment diagnosis, recovery vehicle operation, compressor monitoring, and any scenario where pressure data is mission-critical. The 300 psi range covers most automotive hydraulic and pneumatic applications, from brake system diagnostics to air suspension monitoring.

AUTOMETER is recognized for precision instrumentation in automotive and industrial settings. The mechanical construction and liquid-filled protection reflect design principles proven across thousands of field deployments, offering the directness and durability operators expect from analog pressure instruments.