MQ-3 Gas Sensor (Alcohol Ethanol)

Monitor alcohol ethanol with this MQ-3 gas sensor from Waveshare!

Comes complete with a 4-pin sensor cable.

Note: Please do not use this sensor for critical home/industrial/commercial gas sensing applications. Intended for development and learning/hobby purposes only.

Features

• Sensitive for alcohol ethanol
• Output voltage boosts along with the concentration of the measured gases increases
• Fast response and recovery
• Adjustable sensitivity
• Signal output indicator
• Sensor only - no cable

Specifications

• Power: 2.5V ~ 5.0V
• Dimension: 40.0mm * 21.0mm
• Mounting holes size: 2.0mm

Package Contents

• 1x MQ-3 sensor
• 1x 4-pin sensor cable

Resources

• Product Wiki

In the case of working with an MCU:

• VCC ↔ 2.5V ~ 5.0V
• GND ↔ power supply ground
• AOUT ↔ MCU.IO (analog output)
• DOUT ↔ MCU.IO (digital output)