Gravity: Analog Gas Sensor (MQ2)

The Gravity: Analog Gas Sensor (MQ2) is a versatile gas-sensing module designed for students, makers, and developers building environmental monitoring and safety systems. Equipped with an MQ2 probe, it measures the concentration of various combustible gases and smoke, outputting an analog voltage proportional to gas density.

Multi-gas detection capabilities

The onboard MQ2 probe is capable of detecting LPG, i-butane, propane, methane, alcohol, hydrogen, and smoke. Its wide detecting scope makes it suitable for gas leakage detection in consumer and industrial applications.

Adjustable sensitivity and fast response

Featuring high sensitivity and rapid response times, the sensor allows users to calibrate detection thresholds using an onboard potentiometer. The analog output provides straightforward voltage readings directly proportional to gas concentration.

Gravity interface and platform compatibility

The module uses a standard Gravity interface for plug-and-play connection with microcontroller expansion shields. It also supports 3.3V operation, enabling direct use with platforms such as Raspberry Pi, Intel Edison, Joule, and Curie.

Durable and standardised board design

Constructed with an immersion gold surface and high-quality connectors, the board includes functional icons and clear interface identification. Standard 3mm mounting holes spaced at 5mm intervals simplify physical integration.

Compact specifications and pinout

The module measures 36.4 x 26.6mm and operates on a 5V power supply with a simple drive circuit designed for long-term stability. The 3-pin layout provides dedicated connections for Output, VCC, and GND.

Package contents

Each unit is supplied with one MQ2 analog gas sensor module and one Gravity analog connection cable.

Downloads & documentation

• Product wiki (DFRobot)