Murphy OPLC-A-30-EL Pressure Swichgage

The Murphy OPLC-A-30-EL is a rugged, combination pressure gauge and switch instrument designed for monitoring and controlling pressure in industrial applications. Manufactured by FW Murphy, this Swichgage features a 4-1/2 inch dial with a dual scale (0-30 psi / 0-200 kPa) and adjustable high and low contact pointers that act as limit switches for alarms or shutdowns. It is ideal for use in oil and gas, engine, compressor, and pump systems where reliable pressure monitoring is critical to prevent equipment damage. Key features include surface mounting, a weather-resistant enclosure, and electrical switch capabilities rated for pilot duty. Advantages over similar products include its integrated design reducing installation complexity, high durability in harsh environments, and proven reliability in safety-critical operations. Drawbacks may include the need for periodic calibration and mechanical wear over time compared to fully digital alternatives. This model offers explosion-proof options and is suitable for hazardous locations. Overall, it provides cost-effective, real-time pressure indication and control, enhancing operational safety and efficiency.