MQ-8 Hydrogen Gas Sensor Module H₂ Gas Detection for Arduino

The MQ-8 gas sensor is a high-sensitivity semiconductor sensor specifically developed for hydrogen (H₂) gas detection. It is widely used in hydrogen leak detection, fuel cell systems, industrial safety monitoring, and laboratory environments.

This module offers fast response, stable output, and long operational life. It supports analog output for precise gas concentration measurement and digital output via an onboard comparator for threshold-based detection.

The MQ-8 sensor works seamlessly with Arduino, ESP32, ESP8266, STM32, Raspberry Pi, and other MCU platforms, making it ideal for IoT gas monitoring systems and educational projects.

Key Features

• Detects Hydrogen gas (H₂)

• High sensitivity and fast response time

• Analog and digital output signals

• Adjustable detection threshold via potentiometer

• Compatible with Arduino, ESP32, ESP8266, STM32

• Stable performance and long lifespan

• Low cost solution for hydrogen leak detection

• Ideal for industrial, research, and safety applications

Technical Specifications

• Sensor Type: Semiconductor gas sensor

• Target Gas: Hydrogen (H₂)

• Detection Range: 100 – 10,000 ppm (approx.)

• Output Type: Analog (AO) + Digital (DO)

• Operating Voltage: 5V DC

• Heater Voltage: 5V

• Interface: Analog / Digital

• Response Time: ≤10 seconds

• Preheat Time: Recommended 24–48 hours for accuracy

• Operating Temperature: -10°C to +50°C

• Operating Humidity: ≤95% RH

Applications

• Hydrogen leak detection systems

• Fuel cell monitoring

• Industrial gas safety systems

• IoT gas monitoring projects

• Laboratory and research equipment

• Arduino and ESP32 gas sensor projects

• Educational electronics and STEM labs