An alcohol vapour sensor module from the ELECFREAKS PlanetX range, designed for use with micro:bit via an RJ11 connector. The MQ3 sensor uses a tin dioxide (SnO2) sensing element whose conductivity increases with alcohol gas concentration, providing an analog output you can read and process in MakeCode or Python.

Connects directly to PlanetX-compatible expansion boards such as the Nezha, making it easy to add gas detection to micro:bit projects without complex wiring.

Key Features

• MQ3 Gas Sensor – Detects alcohol vapour concentration
• Analog Output – Proportional to gas concentration
• RJ11 Connector – Plug-and-play with PlanetX expansion boards
• 3.3 V Operating Voltage – micro:bit compatible
• MakeCode & Python – Supported programming environments
• SKU – EF05032

Ideal For

• micro:bit science and chemistry experiments
• Air quality and gas detection projects
• STEM education and classroom activities

Package Contents

• 1× ELECFREAKS PlanetX MQ3 Sensor

Resources

• Wiki Documentation