Alcohol Gas Sensor MQ-3

Product Description

Description: This alcohol sensor is suitable for detecting alcohol concentration on your breath, just like your common breathalyzer. It has a high sensitivity and fast response time. Sensor provides an analog resistive output based on alcohol concentration. The drive circuit is very simple, all it needs is one resistor. A simple interface could be a 0-3.3V ADC.



Please review the datasheet for conversions to ppm then Wikipedia.org for BAC.



Features:

• 
  5V DC or AC circuit


• 
  Requires heater voltage


• 
  Operation Temperature: -10 to 70 degrees C


• 
  Heater consumption: less than 750mW

Dimensions:

• 
  16.8mm diameter


• 
  9.3 mm height without the pins

Documents:

• 
  Datasheet


• 
  Arduino Tutorial in Portuguese


• 
  Wiring Example


• 
  Arduino Breathalyzer


• 
  Another Breathalyzer