# MQ-8 Hydrogen Gas Sensor

> The MQ-8 sensor detects hydrogen and is suitable for Arduino projects and industrial monitoring applications. It operates at 5VDC with low power consumption, features an analog output of 0-5V that varies with the detected concentration, and a digital TTL output for thresholds. It is resistant to interference from ethanol, CO2 and other gases for more stable measurements.

- Page: https://sigmanortec.ro/en/mq-8-hydrogen-gas-sensor
- Price: 9.34 RON
- Availability: In stock; 1-2 zile
- Reference: 22137 · EAN: 5943947744758
- Category: Mechatronics and IoT > Sensors and Modules > Gas and Air Quality Sensors
- Package (shipping data): 0.008 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

The MQ-8 sensor is ideal for detecting hydrogen in Arduino projects and industrial monitoring applications, it operates at 5VDC with low consumption, has a 0-5V analog output that varies with the detected concentration and a TTL digital output for thresholds, and is resistant to interference with ethanol, CO2 and other gases for more stable measurements.
MQ5 sensor used to detect Hydrogen.
Specifications:
Resistant to interference with Ethanol, CO2 and other gases
Supply voltage: 5VDC, a50mA
Output: Digital pin or Analog pin
Analog Output: 0 - 5V; the voltage increases or decreases depending on the detected concentration
TTL Digital Output
Analogue reading code example:
void setup() {
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
}
// the loop routine runs over and over again forever:
void loop() {
// read the input on analog pin 0:
int sensorValue = analogRead(A0);
// print out the value you read:
Serial.println(sensorValue);
delay(1); // delay in between readings for stability
}