SNS-MQ3 (Olimex) ALCOHOL AND BENZINE SENSOR

https://www.olimex.com/Products/Components/Sensors/SNS-MQ3/

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

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

FEATURES

• Detects alcohol and benzin
• 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