# Digital voltmeter, 0.28", 4-30VDC, 2 wires, Red

> Digital voltmeter module with a red 0.28" display, for voltages between 4-30VDC, powered and measured through 2 wires. Features a 3-character display with automatic decimal point, 500ms refresh rate, and +-1% accuracy. Includes a rear calibration screw, mounting ears (33 x 10.7 x 7.5mm), and wires approximately 10cm long. Operating temperature: -10 - 65 degrees C.

- Page: https://sigmanortec.ro/en/digital-voltmeter-028-4-30vdc-2-wires-red
- Price: 8.46 RON
- Availability: In stock; 1-2 zile
- Reference: 9461 · EAN: 5947518290965
- Category: Electronic components > Testing and Measurement > Panel Meters
- Specifications: Supply Voltage: 4 VDC; Maximum Input Voltage: 30 VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.
- Package (shipping data): 0.006 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 02:22 (Europe/Bucharest)

## Description

Mini module with 0.28 inch red display for quick voltage monitoring in electronic projects and panels, operates and measures between 4 and 30VDC via 2 wires, offers clear 3-character reading with automatic decimal point, allows calibration from the rear screw for correct display, is easy to mount thanks to the mounting lugs and has a fast refresh rate of 500ms.
Mini voltmeter module with 0.28 inch display, Red color, which can display a voltage between 4 and 30VDC.
It is equipped with 2 wires that supply power and at the same time measure voltage.
On the back of the module there is a screw that allows you to calibrate the displayed voltage (they are not calibrated from the factory).
The module has 33mm mounting lugs.
The decimal point moves automatically.
Specifications:
Supply voltage: 4 - 30VDC
Measured voltage: 4 - 30VDC
Display: 3 characters with one decimal point, digital tube
Display size: 0.28 inch
Display color: Red
Refresh rate: 500ms
Accuracy: +-1% declared
Operating temperature: -10 - 65 degrees C
Dimensions mm: 33 x 10.7 x 7.5mm (ears included)
Wire length: approximately 10cm
Number of threads: 2