Waterproof DC 4-100V LED Digital Voltmeter – Vehicle Battery Monitor
Waterproof DC 4-100V LED Digital Voltmeter – Vehicle Battery Monitor
Waterproof DC 4-100V LED Digital Voltmeter Panel – Car, Motorcycle & Multi-Vehicle Voltage Monitor
Stay in control of your vehicle's electrical system with this compact, waterproof DC Digital Voltmeter. Designed for cars, motorcycles, boats, buses, and trailers, this panel-mount gauge delivers real-time battery voltage readings at a glance — so you're never caught off guard by a failing battery.
Key Features
- Wide Measurement Range: Accurately reads DC 4–100V with a ±1% allowable tolerance, making it compatible with most 12V, 24V, and 48V vehicle and battery systems.
- Bright LED Display: Three-digit LED readout available in red, blue, or green — blue and green LED options are especially vivid in outdoor and bright-light conditions for effortless reading at a glance.
- Waterproof & Durable Build: Constructed from ABS and flame-retardant materials, this voltmeter is wear-resistant, weatherproof, and built to withstand demanding environments, from engine bays to open decks.
- Reverse Connection Protection: Built-in reverse polarity protection prevents damage from accidental incorrect wiring, keeping both your gauge and your vehicle's electronics safe.
- Fast Refresh Rate: Updates every ~300ms for near real-time voltage monitoring, so you always have the most current reading.
- Easy Panel Mount: 30mm mounting hole diameter and a short 20cm lead make installation clean and straightforward in dashboards, control panels, or toolboxes.
- Wide Operating Temperature: Rated from -30°C to +65°C, this voltmeter performs reliably year-round in all climates.
- Portable & Lightweight: Small enough to store in a glove box, trunk, or toolbox as a quick-check backup tool.
Specifications
| Measuring Range | DC 4–100V (direct measurement) |
| Tolerance | ±1% |
| Display | 3-digit LED (Red / Blue / Green) |
| Refresh Speed | ~300ms |
| Material | ABS + Flame Retardant |
| Product Size | ~33.8 × 33.8 × 18 mm (1.33 × 1.33 × 0.71 in) |
| Lead Length | ~20 cm (7.87 in) |
| Mounting Hole | 30 mm (1.18 in) |
| Operating Temp | -30°C to +65°C |
| Country of Origin | Made in Mainland China |
What's in the Box
- 1 × Automotive LED Digital Voltmeter Gauge
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Learn more: FuelEconomy.gov driving efficiency guidance
Frequently Asked Questions
Q: What vehicles is this DC digital voltmeter compatible with?
A: This waterproof voltmeter is suitable for any DC-powered vehicle or system operating within the 4–100V range, including cars, motorcycles, buses, boats, ships, trailers, and RVs. It's also useful for monitoring solar panels, battery banks, and other DC electrical systems.
Q: How do I install the panel-mount voltmeter?
A: Installation is straightforward — drill or use an existing 30mm hole in your dashboard, control panel, or enclosure, insert the voltmeter, and connect the two leads directly to your DC power source. The short 20cm leads make for a tidy, clean fit. Always ensure correct polarity; reverse connection protection is included as a safety backup.
Q: What LED display color should I choose?
A: All three colors (red, blue, and green) are clearly visible, but blue and green LED displays offer greater brightness and contrast in outdoor or high-ambient-light conditions. Red is a classic choice for interior dashboard use. Choose the color that best suits your installation environment.
Q: Is this voltmeter truly waterproof?
A: Yes — the voltmeter is built from ABS and flame-retardant materials and is designed to be waterproof, making it suitable for use on boats, motorcycles, and in exposed outdoor installations where it may be exposed to rain or moisture.