The MQ-8 Gas Sensor Module is a 32mm x 21mm x 20mm SnO2 semiconductor sensor specifically designed for hydrogen (H2) detection across 100 to 10,000 ppm, operating at 5V DC with around 150mA current consumption for the onboard heater. The mq8 gas sensor module is the hydrogen-specific member of the MQ family — while MQ-5 detects H2 alongside LPG, CH4, and CO with moderate sensitivity, the mq8 sensor module is optimised specifically for H2, giving stronger and more selective hydrogen response, which matters for applications like hydrogen fuel cell systems, electrolysis setups, and battery charging room monitoring where H2 is the primary safety concern.
The mq8 sensor analog output voltage reads approximately 0.1-0.3V in clean air — this baseline range serves as the “no hydrogen detected” reference point, and the H2 gas sensor voltage rises above this baseline as hydrogen concentration increases. Like other MQ-series sensors, this requires heater warm-up time before stable baseline readings are achieved. The 100ppm lower detection bound (compared to 200ppm for MQ-5/6/9) allows the mq8 gas sensor module to detect trace hydrogen leaks earlier than broader combustible-gas sensors.
the higher H2-specificity comes at the cost of reduced sensitivity to other combustible gases — for general LPG or methane leak detection, MQ-5 or MQ-6 remains more appropriate than this hydrogen-focused sensor. Available from StemVolt, this MQ-8 gas sensor module is ideal for makers developing hydrogen gas detection systems, safety monitoring devices, and embedded sensing projects with reliable hydrogen concentration measurement capabilities.
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Features:
- Hydrogen-specific sensing with stronger H2 response than MQ-5
- 100-10000ppm range detects trace hydrogen leaks earlier
- 0.1-0.3V clean-air baseline serves as no-hydrogen reference point
- 5V DC at 150mA, heater warm-up required for stable readings
- Compact 32x21x20mm suits fuel cell and battery room monitoring
Technical Specifications:
Applications:
- MQ-8 Sensor used for Arduino hydrogen fuel cell leak detector
- College project uses mq8 gas sensor module for H2 detection demo
- Lab uses mq8 sensor module for India electrolysis safety monitoring
- Battery room uses mq8 sensor for hydrogen accumulation alarm build
- Research setup uses H2 gas sensor for hydrogen concentration logging
Package Includes:
- 1 x MQ-8 Gas Sensor Module
Rohit Acharya –
Impressed with quality
Sandesh Kaul –
Original product received
Prajwal Kudva –
Fast delivery service
Dhirendra Tandon –
Damage proof packing ensured safe delivery, while after sale support helped with sensor integration and project development queries
Sanjana Naik –
Gas sensor module provides reliable hydrogen (H₂) gas detection and is ideal for engineering projects, PM Shri lab activities, and gas monitoring applications
Kavya Salian –
Received this MQ-8 gas sensor in excellent condition, hydrogen detection was responsive and accurate, making it perfect for my engineering project.