VDO Heavy Duty Normally Closed Single Circuit 15 PSI Pressure Switch

The VDO Heavy Duty Normally Closed Single Circuit 15 PSI Pressure Switch (MPN 230-515) is a precision electrical component engineered for marine engine monitoring and fuel system management on recreational and commercial vessels. Built to withstand the harsh saltwater and vibration environment of boats, this pressure switch automatically triggers circuit closure when system pressure drops below 15 PSI, protecting your engine from low-pressure conditions that can cause catastrophic damage. Whether you're running a single outboard or managing a complex onboard hydraulic or fuel system, this heavy-duty switch provides the reliability serious anglers and boaters demand when they're far from shore.

This normally closed design means the switch remains in its resting state until pressure thresholds trigger activation, a critical safety feature for marine propulsion systems. The switch operates across a 6–24V range, offering compatibility with both 12V and 24V marine electrical systems common on different vessel sizes and engine configurations. Silver alloy contacts provide superior corrosion resistance and consistent electrical conductivity in saltwater environments, while the floating ground design eliminates installation complications on various boat wiring configurations. The #8-32 connection standard ensures straightforward integration with existing marine fuel and oil pressure monitoring harnesses.

Serious boaters—from offshore tournament anglers to weekend cruisers—rely on pressure switches like this to trigger warning lights or shut down fuel pumps when oil or fuel pressure falls dangerously low. Installation is straightforward on inboard, outboard, and jet drive engines, fitting seamlessly into existing gauge clusters and engine management wiring. At just 0.3 lbs and compact 5 x 1 x 8-inch dimensions, it mounts easily in tight engine compartments. This is the exact replacement or upgrade component professional marine mechanics and savvy boat owners choose for long-term durability and peace of mind on the water.