Alcohol Gas Sensor MQ-3

Description: SNS-MQ3 is a sensor module that detects alcohol and gas in the air. It has higher sensitivity to alcohol and lower sensitivity to gas.

Heater voltage 5V, 31 ohm (40mA consumption)

Features:

• Detects alcohol and gas
• Operating voltage: 5V
• Operating current: 40mA
• Both digital and analog output
• Popular sensor - a lot of examples available for different platforms
• Port explanation : AO for analog output, DO for digital output, GND for ground, VCC for 5V voltage input

Documents:

• SNS-MQ3 datasheet
• Setting up SNS-MQx sensors
• Experimenting with gas sensors and Arduino
• MQ and air quality sensors (PDF)