MQ-8 Hydrogen Gas Sensor

MQ-8 Hydrogen Gas Sensor

The MQ-8 Hydrogen Gas Sensor Module is a highly sensitive gas detection sensor designed to detect Hydrogen (H₂) gas concentrations in the air. Built with a semiconductor sensing element based on SnO₂ (Tin Dioxide), the sensor changes its conductivity when exposed to hydrogen, allowing accurate monitoring of gas leaks and hydrogen levels. It is widely used in industrial safety systems, battery charging stations, fuel cell monitoring, and Arduino-based gas detection projects. The module provides both analog and digital outputs, making it easy to interface with microcontrollers such as Arduino, ESP32, Raspberry Pi, and other development boards.

Features

• High sensitivity to Hydrogen (H₂) gas
• Analog and digital output signals
• Adjustable detection threshold via onboard potentiometer
• Fast response and recovery time
• Compatible with Arduino, ESP32, Raspberry Pi, and other MCUs
• Stable performance with long operational life
• Easy-to-use module design for DIY and industrial projects
• Suitable for gas leak detection and safety monitoring applications

Specifications

• Sensor Type: MQ-8 Hydrogen Gas Sensor
• Detectable Gas: Hydrogen (H₂)
• Detection Range: 100–10,000 ppm
• Operating Voltage: 5V DC
• Heater Voltage: 5V DC
• Output Type: Analog (A0) and Digital (D0)
• Heater Consumption: ≤ 900mW
• Operating Temperature: -10°C to 50°C
• Fast response and recovery characteristics
• Adjustable sensitivity threshold

Applications

• Hydrogen gas leak detection systems
• Industrial safety monitoring
• Fuel cell and hydrogen energy projects
• Battery charging room monitoring
• Laboratory and research applications
• Smart home gas alarm systems
• Arduino and IoT-based gas sensing projects