Description
DC 4V-30V Mini 0.28″ Red LED Digital Voltmeter 2-Wire
The DC 4V-30V Mini Digital Voltmeter is a compact and easy-to-install voltage meter designed for monitoring DC voltage in batteries, vehicles, power supplies, and DIY electronic projects. Its bright 0.28-inch red LED display provides clear readings, even in low-light conditions.
With a simple 2-wire connection, reverse-polarity protection, and a compact panel-mount design, this voltmeter is a practical solution for checking voltage in 5V, 9V, 12V, 24V, and other DC systems within its supported range.
Key Features
- DC 4V-30V Measurement Range: Suitable for monitoring a wide range of low-voltage DC systems.
- Clear 0.28-Inch LED Display: Bright red digits provide easy-to-read voltage measurements.
- Simple 2-Wire Connection: Easy to connect directly to the power source being measured.
- Compact & Lightweight: Its small size makes it ideal for installations where space is limited.
- Reverse Polarity Protection: Helps protect the meter if the power wires are accidentally connected in reverse.
- 0.1V Resolution: Provides clear and useful voltage readings for everyday monitoring.
- Adjustable Accuracy: The rear potentiometer allows calibration and adjustment of the displayed voltage.
- Wide Applications: Suitable for cars, motorcycles, batteries, power supplies, control panels, and electronics projects.
Applications
This mini digital voltmeter is suitable for:
- Car and motorcycle battery monitoring
- 12V and 24V electrical systems
- DC power supplies
- Battery-powered projects
- Solar and DIY electronics projects
- Electrical control panels
- General-purpose voltage monitoring
Important Note
The input/detection voltage should remain within 4V to 30V DC. Do not apply more than 30V to the meter, as excessive voltage may damage the device.
Specifications
| Specification | Details |
|---|---|
| Product Type | Mini Digital DC Voltmeter |
| Connection | 2-Wire |
| Measurement Range | DC 4V-30V |
| Working Voltage | DC 4V-30V |
| Operating Current | Less than 20mA |
| Display | 0.28-inch Red LED |
| Resolution | 0.1V |
| Measuring Accuracy | Approximately ±0.3% |
| Measurement Rate | More than 200ms/time |
| Dimensions | 33 × 10.7 × 8.2 mm |
| Installation Opening | 28.5 × 10 mm |
| Reverse Connection Protection | Yes |
| Minimum Operating Voltage | 4.0V DC |
| Maximum Operating Voltage | 40V DC* |
| Operating Temperature | -10°C to +65°C |
| Operating Humidity | 10% to 80% (non-condensing) |
| Working Pressure | 80-106 kPa |
*For safe voltage measurement, the specified 2-wire measurement range is 4V-30V DC.
Package Includes
- 1 × 0.28-inch Mini Digital Voltmeter
Wiring
- Red: Power supply positive (+)
- Black: Power supply negative (-) / Measurement negative
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