Blue Sea 1733 Mini OLED DC Voltmeter

The Blue Sea 1733 Mini OLED DC Voltmeter is a compact, waterproof digital voltmeter designed for marine electrical systems that demand real-time voltage monitoring in harsh saltwater environments. Built with an OLED display that remains daylight-readable even in bright sunlight, this voltmeter delivers instant voltage readings on a screen engineered to perform where LCD panels fail. It's the kind of instrument serious boaters—from weekend anglers to offshore captains—install when they need reliable voltage data without sacrificing precious console space.

The unit accepts dual-voltage systems (12V and 24V DC) and monitors the full input range of 8–36V DC, making it compatible with standard battery banks, auxiliary power systems, and alternator output on vessels of all sizes. The 0.01V resolution provides the precision needed to detect early battery degradation or charging system anomalies before they strand you offshore. Reverse polarity protection safeguards against accidental wiring errors during installation. Its compact footprint mounts through a standard 1-1/8-inch hole—a size found on most marine consoles and panels—allowing flexible placement where you need voltage data most accessible.

IP66 waterproof rating means this voltmeter withstands deck spray, washdown, and the corrosive salt-air environment that degrades lesser instruments. It's built for the operator who runs electronics hard and expects them to survive. Whether you're monitoring battery health during a multi-day offshore trip, troubleshooting a charging system mid-season, or keeping tabs on auxiliary battery drain while anchored in remote waters, the Blue Sea 1733 delivers the voltage intelligence that prevents electrical failures at sea.