JOY-IT MQ2V2 Semiconductor Gas Sensor Module for Methane, Propane, Butane, LPG, Smoke, Alcohol, Hydrogen – Analog & Digital Output, 5V, Arduino/Raspberry Pi Compatible

The JOY-IT MQ2V2 is a versatile semiconductor gas sensor module capable of detecting a wide range of flammable and combustible gases, including methane, propane, butane, LPG, smoke, alcohol, and hydrogen. Its dual analog and digital outputs make it ideal for both simple threshold-based alarms and precise concentration measurements in DIY electronics and industrial prototyping.

Advantages

This sensor offers a fast response time of under 10 seconds and a recovery time of under 30 seconds, ensuring real-time monitoring. The on-board potentiometer allows easy sensitivity adjustment, while the power and digital output LEDs provide immediate visual feedback. With a standard 4-pin header and 5V operation, it integrates seamlessly with Arduino, Raspberry Pi, and other microcontrollers.

Suitable for

• Home and industrial gas leak detection systems
• Air quality monitoring and smoke alarms
• Educational electronics projects and STEM learning
• Robotics and automation safety systems
• IoT environmental sensing applications

Key specifications

• Sensor model: MQ-2 semiconductor gas sensor
• Detected gases: Methane (CH4), Propane (C3H8), Butane (C4H10), LPG, Smoke, Alcohol, Hydrogen (H2)
• Detection range: 300–10000 ppm for LPG, propane, methane; 100–10000 ppm for hydrogen
• Operating voltage: 5V DC
• Output: Analog (0–5V) and digital (TTL level)
• Interface: 4-pin header (VCC, GND, DOUT, AOUT)
• Response time: ≤10 seconds; Recovery time: ≤30 seconds
• Operating temperature: -20°C to 50°C
• Operating humidity: ≤95% RH (non-condensing)
• On-board sensitivity adjustment potentiometer
• Indicator LEDs for power and digital output
• Compatible with Arduino, Raspberry Pi, and other microcontrollers

Recommendations

For reliable gas detection in your next project, pair the MQ2V2 with a microcontroller and a simple voltage divider for analog reading. Calibrate the sensor in clean air before deployment, and allow a preheat time of at least 24 hours for optimal stability. Always ensure adequate ventilation when testing with flammable gases.