Hydrogen Sensor MQ8 (Digital/Analog)

Overview

The MQ8 Hydrogen Gas Sensor is a highly sensitive and reliable sensor designed for detecting hydrogen gas concentrations in the environment. It is an essential component for safety systems, IoT projects, and industrial monitoring applications. The sensor provides both analog and digital output signals, making it versatile and easy to interface with microcontrollers like Arduino, ESP32, and Raspberry Pi. With its compact design and low power consumption, the MQ8 is ideal for building hydrogen leak detectors, air quality monitors, and safety alarms.

Key Features

• Dual Output: Provides both analog (voltage proportional to gas concentration) and digital (threshold-based TTL) outputs.
• High Sensitivity: Specifically optimized for hydrogen gas detection, with a detection range of 100-10000 ppm.
• Fast Response: Quick recovery and response times (≤10s), ensuring timely alerts.
• Adjustable Sensitivity: Onboard potentiometer allows you to set the digital output trigger threshold.
• Low Power Consumption: Heater consumes only 150mW, suitable for battery-powered projects.
• Long Life: Stable performance over a long operational life.

Technical Specifications

• Operating Voltage: 5V DC
• Heater Resistance: 33Ω ± 5%
• Heater Power Consumption: ≤150mW
• Sensor Resistance: 10KΩ - 90KΩ (in clean air)
• Detection Range: 100 - 10,000 ppm (Hydrogen)
• Response Time: ≤10s
• Recovery Time: ≤30s
• Output: Analog voltage (0-5V) and Digital TTL (0/1)
• Dimensions: 32mm x 20mm x 22mm
• Weight: 7g

Applications & Use Cases

• Home Safety: Detect hydrogen gas leaks from fuel cells, batteries, or hydrogen storage systems.
• Industrial Monitoring: Monitor hydrogen concentrations in industrial environments where hydrogen is used or produced.
• IoT Projects: Integrate with Arduino, Raspberry Pi, or ESP32 to build smart gas detection systems.
• Educational Kits: Perfect for STEM education and electronics labs to demonstrate gas sensing principles.
• Robotics: Use in autonomous robots to detect hazardous environments.

What's Included

• 1x MQ8 Hydrogen Gas Sensor Module (with analog and digital outputs)
• 1x Breakout board with onboard potentiometer and LEDs
• 1x Pin header (unsoldered)

Compatibility

• Microcontrollers: Arduino (Uno, Mega, Nano), Raspberry Pi (via ADC), ESP32, STM32, and other 5V logic devices.
• Analog Input: Connect AO pin to an analog input of your microcontroller (e.g., A0 on Arduino).
• Digital Input: Connect DO pin to a digital input; adjust the potentiometer to set the trigger threshold.
• Power: Supply 5V DC to VCC and GND.

MOKWN Recommendation

For best results, allow the sensor to preheat for at least 24 hours before initial calibration. During operation, keep the sensor away from corrosive gases and solvents to maintain accuracy. Combine with our Arduino starter kits or ESP32 development boards for a complete hydrogen detection solution. For any questions, our Cairo-based support team is ready to assist you in Arabic and English.