0–100V 0–10A Digital Panel Voltmeter & Ammeter – Precise readings with a dual LED display visible from any angle
When building a control panel, an adjustable power supply, or a solar energy system, you need to monitor voltage and current in real-time. Without a fixed instrument, you are often left juggling a multimeter or guessing the values. This digital panel meter solves that problem—install it once and monitor your circuit at a glance.
Note: The module requires a separate or common DC 4–30V power supply to operate. For measuring voltages above 30V, please use Wiring Diagram 2 with an independent power source for the module.
Why choose this model? (Key advantages):
- Dual Red-Blue LED Display — 0.28″ digits; voltage in red, current in blue. Easy to read even in low-light workshops or direct sunlight.
- Integrated Internal Shunt — No external components required for currents up to 10A; simply connect and go.
- ±1% Accuracy with 0.1V / 0.01A Resolution — Highly reliable for laboratory projects, 12V/24V solar systems, or custom power supplies.
- Versatile Wiring — Supports common power (under 30V) or separate power (up to 100V) configurations to suit any application.
- Low Power Consumption (≤20 mA) — Minimal impact on your circuit, which is essential for battery-powered systems.
- Quick Installation — Standard 46×27 mm cutout, pre-wired with 15 cm leads, and mounting clips included.
Details and Performance
At the heart of this module is a dedicated measurement microcontroller that updates the display every 300 ms—fast enough to capture load variations without the screen flickering distractingly. With an operating temperature range of –10°C to +65°C, it is suitable for both indoor distribution boxes and technical equipment exposed to thermal fluctuations. Thanks to its maximum power draw of 20 mA, the instrument does not introduce significant errors, even in load-sensitive circuits.
| Parameter | Value / Detail |
|---|---|
| Measurable Voltage | DC 0–100V |
| Measurable Current | DC 0–10A |
| Supply Voltage | DC 4–30V |
| Power Consumption | ≤ 20 mA |
| Accuracy | ±1% (±1 digit) |
| Voltage Resolution | 0.1V |
| Current Resolution | 0.01A |
| Refresh Rate | 300 ms |
| Display | Dual 0.28″ LED – Red (V) / Blue (A) |
| Operating Temperature | –10°C to +65°C |
| Module Dimensions | 48 × 29 × 26 mm |
| Panel Cutout Size | 46 × 27 mm |
| Cable Length | 15 cm |
Wiring and Usage Instructions
- Diagram 1 – Common Power: Connect the DC 4–30V source to both the module power input and the load. Connect the voltage measurement wires in parallel with the load and the ammeter shunt in series.
- Diagram 2 – Separate Power: Use a dedicated DC 4–30V source exclusively to power the module. The main circuit can then be powered independently with voltages up to 100V—perfect for adjustable lab power supplies.
- Create a 46 × 27 mm cutout in your panel and insert the module from the front.
- Secure the module using the included side clips and connect the wires according to your chosen diagram.
- Switch on the power—the display will light up immediately, showing real-time voltage and current.
Package Contents
- 1× Digital Panel Voltmeter/Ammeter Module DC 0–100V / 0–10A
- Connection cables (~15 cm, pre-wired)
- Side mounting clips for panel installation
Frequently Asked Questions
Can I use this on a 12V or 24V solar system?
Yes, absolutely. The module’s supply voltage (4–30V) is perfectly compatible with standard solar installations, and the 0–100V / 0–10A measurement range covers typical small to medium-sized solar panel parameters.
Do I need an external shunt for the ammeter?
No. The shunt is built into the module and supports currents up to 10A. No additional components are needed.
How do I measure voltages above 30V if my power supply is limited to 30V?
Use Diagram 2: power the module from a separate 4–30V source, and the circuit being measured can reach up to 100V independently. The two circuits will not interfere with each other.
Does this work with Alternating Current (AC)?
No. This module is designed exclusively for DC circuits. Do not connect it to AC power.
What is the exact cutout size for installation?
You need a 46 × 27 mm cutout. The module face measures 48 × 29 mm, ensuring the edges sit flush and secure on your panel.
Photo Gallery
***li** T***o* –
Exactly what I needed for my bench power supply. The dual colors (red/blue) make it easy to differentiate volts and amps.