Murphy OPLC-A-400 Pressure Swichgage

The Murphy OPLC-A-400 is a robust, combination pressure gauge and limit switch device designed for monitoring and controlling pressure in industrial applications. Manufactured by FW Murphy, this Swichgage integrates a high-visibility dial gauge with adjustable high and low limit switches, providing both visual indication and electrical switching for alarms or shutdowns. It is ideal for use in oil and gas, compressors, engines, pumps, and other equipment where reliable pressure monitoring is critical to prevent failures. Key features include a weatherproof enclosure for harsh environments, a 0-400 PSI range, and pilot duty electrical ratings suitable for control circuits. Advantages over similar products include its durable construction, easy setpoint adjustments via external knobs, and proven reliability in demanding conditions, reducing downtime and maintenance costs. Drawbacks may include its analog design lacking digital outputs, making it less suitable for modern IoT integrations, and potential wear in high-vibration settings if not properly mounted. This used unit shows signs of operational wear but remains functional, offering cost-effective performance for legacy systems. Overall, it's a trusted choice for safety-critical pressure control, with applications in marine, power generation, and process industries.