# DC Voltage Sensor 0-25V, 3.3-5V

> DC voltage sensor module for measuring direct voltages between 0-25V. Powered at 3.3-5V, it offers a resolution of 0.00489V and a minimum detectable voltage of 0.02445V. Compact dimensions of 25 x 13 mm, with an S pin for analog signal output to an Arduino or other compatible development board. Can be paired with an I2C LCD display to show the voltage in real time.

- Page: https://sigmanortec.ro/en/dc-voltage-sensor-0-25v-33-5v
- Price: 3.76 RON
- Availability: In stock; 1-2 zile
- Reference: 22106 · EAN: 5944442515652
- Category: Mechatronics and IoT > Sensors and Modules > Voltage and Current Sensors
- Specifications: Supply Voltage: 3.3 V; Maximum Input Voltage: 5 V; Input Voltage: 0-25 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.
- Package (shipping data): 0.003 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 02:21 (Europe/Bucharest)

## Description

Module for measuring DC voltage between 0 and 25V, ideal for projects with Arduino and other development boards. It operates on 3.3-5V power supply, offers good resolution of 0.00489V for stable readings, simply connects via the S pin to the analog input, has compact dimensions of 25 x 13 mm and can display live voltage together with an I2C LCD.
The DC voltage sensor is a compact and versatile module, designed to be easily integrated into Arduino projects and other compatible development platforms. The module allows measuring continuous voltages in the range of 0-25VDC, offering a resolution of 0.00489V and a minimum detectable voltage of 0.02445V, making it suitable both for battery monitoring applications and for real-time measurement systems.
It is powered directly from the development board, accepting voltages between 3.3 and 5VDC, eliminating the need for an additional external power source. Due to its small size of 25 x 13 mm, the module integrates easily into projects with limited space.
A popular use case is the combination with an LCD screen with I2C interface, which allows displaying the measured voltage value in real time directly on the display, without complex additional components.
Specifications:
Compatibility: Arduino, 3.3V and 5V development platforms
Power supply voltage: 3.3 - 5VDC
Measured voltage: 0 - 25VDC
Resolution: 0.00489V
Minimum detected voltage: 0.02445V
Dimensions: 25 x 13 mm
Pinout:
Pin
Function
+
Power supply 3.3 - 5VDC
GND (ground)
S
Analog signal output (Arduino analog pin)
Usage:
Connect the "+" pin of the module to the 3.3V or 5V pin of the Arduino board.
Connect the "-" pin of the module to the GND of the Arduino board.
Connect the "S" pin to an analog pin of the Arduino board (e.g., A0).
Connect the voltage to be measured to the input terminals of the module, respecting the polarity.
Upload the test code to the board and open the Serial Monitor to view the read values.
Optionally, connect an LCD module with an I2C interface to display the voltage directly on the screen in real time.