DC 5–30V LED Digital Voltmeter – 0.28" Mini Voltage Tester
Blue no adjustment
$7.82
Sale price
$7.82
Regular price
$9.69
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DC 5–30V LED Digital Voltmeter – 0.28" Mini Voltage Tester
$7.82
Sale price
$7.82
Regular price
$9.69
DC LED Digital Voltmeter – Compact, Accurate & Easy to Install
Keep a close eye on your electrical systems with this ultra-compact DC LED Digital Voltmeter. Whether you're monitoring a car battery, motorcycle, solar panel, mobile power bank, or DIY electronics project, this mini voltmeter delivers fast, reliable voltage readings on a bright 0.28-inch three-digit LED display. Its small footprint and panel-mount design make it ideal for dashboards, control boxes, and custom builds.
Key Features
- Wide Voltage Range: Detects DC voltages from 0 to 40V, with a 2-wire operating range of 4V–40V — suitable for 5V, 12V, 24V, and other common DC systems.
- Bright 0.28" LED Display: Three-digit Nixie tube display ensures clear readings even in low-light conditions.
- Fast Refresh Rate: Updates approximately every 200ms for near real-time voltage monitoring.
- Reverse Polarity Protection: Built-in protection helps prevent damage if wires are accidentally connected in reverse.
- Low Power Draw: Operating current under 20mA keeps power consumption minimal.
- Simple 2-Wire Installation: No extra power supply required — the meter is powered directly from the circuit it measures.
- Panel-Mount Ready: Compact 30 × 11.7 × 9.2mm body fits neatly into a 23 × 10mm installation opening.
- Durable Operating Range: Works reliably across temperatures from -10°C to +65°C.
Specifications
| Display | 0.28-inch 3-digit LED Nixie tube |
| 2-Wire Working Voltage | 4V – 40V (with reverse protection) |
| 2-Wire Detection Range | 0V – 40V DC |
| Working Current | < 20mA |
| Measurement Accuracy | ±3% |
| Refresh Rate | ~200ms/reading |
| Body Size | 30 × 11.7 × 9.2mm |
| Panel Cutout Size | 23 × 10mm |
| Working Temperature | -10°C to +65°C |
| Material | Plastic |
| Country of Origin | Made in Mainland China |
What's in the Box
- 1 × DC LED Digital Voltmeter
Perfect For
- Automotive & motorcycle battery monitoring
- Solar panel & battery bank systems
- DIY electronics and RC projects
- Power supply testing and verification
- Custom control panels and enclosures
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For more information on electrical safety and best practices for DIY electrical work, visit the OSHA Electrical Safety Resource. You can also reference CPSC Electrical Safety Guidelines for consumer electrical product safety.
Frequently Asked Questions
Q: What voltage range can this digital voltmeter measure?
A: This DC LED digital voltmeter can detect voltages from 0V to 40V DC. In 2-wire mode, it operates on a supply voltage of 4V to 40V, making it compatible with most common automotive and electronics applications including 5V, 12V, and 24V systems.
Q: Does this voltmeter work on a car or motorcycle battery?
A: Yes! This voltmeter is well-suited for monitoring 12V automotive and motorcycle batteries. Simply connect the two wires directly to the circuit you wish to measure, and the bright LED display will show the current voltage in real time.
Q: Is installation difficult?
A: Not at all. The voltmeter uses a simple 2-wire connection — no separate power supply is needed. Cut a 23 × 10mm panel opening, insert the meter, and connect the red wire to positive and black wire to negative. The meter is powered directly by the circuit being measured.
Q: Does it have reverse polarity protection?
A: Yes, the 2-wire version of this voltmeter includes built-in reverse polarity protection, helping to safeguard the unit if wires are accidentally connected incorrectly.