Blue Sea Systems Mini OLED DC Voltmeter, 12V/24V, 8-36V DC, 1-1/8 in Cutout

Overview

The Blue Sea Systems Mini OLED DC Voltmeter is a compact panel-mount meter for monitoring DC battery and system voltage on 12V and 24V boats. It reads from 8-36V DC with 0.01V resolution and ±1.0% accuracy, giving a clear voltage check at the helm, nav station, electrical panel, or battery switch area.

The OLED screen is daylight readable and built for exposed marine panels, with IP66 water protection for spray and washdowns. Reverse polarity protection adds a useful margin during installation, and the meter fits a common 1-1/8 inch panel cutout, which makes it practical for new builds, refits, and accessory panels where space is limited.

Key features

• Monitors DC voltage on 12V and 24V systems with an 8-36V DC input range.
• 0.01V display resolution and ±1.0% accuracy help confirm battery state and charging performance at a glance.
• OLED screen stays readable in daylight, making it useful at open helms and cockpit panels.
• IP66 water protection supports installation in marine locations exposed to spray or routine washdowns.
• Reverse polarity protection helps protect the meter during wiring.
• Fits a standard 1-1/8 inch cutout, so it can be added to many panels without needing a large mounting footprint.
• Low 15mA operating current suits continuous voltage monitoring without adding much load to the DC system.
• Operating temperature range of -40°C to 70°C supports use in engine-adjacent panels, cabins, and exposed helm areas.

Variants

This Mini OLED DC Voltmeter is offered in two screen color configurations. Both versions share the same core voltmeter function, 8-36V DC input range, 1-1/8 inch cutout, 15mA operating current, and ±1.0% accuracy.

The main difference is the OLED screen color, which affects the appearance of the display on the panel. The listed OLED life also varies by screen color.

• 1733, screen color yellow. The yellow display gives a warm, high-contrast readout and has a listed OLED life of 100,000 hours.
• 1733200, screen color blue. The blue display gives a cooler readout style that can match many modern helm and electronics layouts, with a listed OLED life of 10,000 hours.

Installation and setup

The meter mounts through a 1-1/8 inch panel hole, so it is well suited to compact dash panels, switch panels, and retrofit locations where a larger meter would be difficult to fit. The small footprint makes it useful for adding a dedicated voltage display near a battery bank, DC distribution panel, or helm electronics feed.

Because it reads voltage directly from the DC circuit, installation should follow proper marine wiring practice, including correct polarity, suitable overcurrent protection, and secure terminations that can handle vibration and moisture. The low operating current makes it practical for installations where the display may remain energized for regular system checks.

Compatibility and fit

This voltmeter is a good match for boats using 12V or 24V DC electrical systems where the operator wants a dedicated voltage readout without adding a large multifunction display or networked monitor. It is useful on powerboats, sailboats, fishing boats, and tenders where battery voltage, alternator output, or charger behavior needs to be checked quickly.

The 8-36V DC input range gives enough coverage for common marine battery systems while keeping the product focused on DC voltage monitoring. It is not a battery monitor with amp-hour tracking, shunt-based current measurement, or network data output, so it should be used where a clear local voltage reading is the requirement.