MQ3 gas sensor

The MQ3 gas sensor is alcohol sensor which is used to detect the alcohol concentration on your breath.This sensor provides an analog resistive output based on alcohol concentration. When the alcohol gas exist, the sensor’s conductivity gets higher along with the gas concentration rising.It is suitable for various applications of detecting alcohol at different concentration.It is widely used in domestic alcohol gas alarm, industrial alcohol gas alarm and portable alcohol detector. Specifications: Supply Voltage: 5V Detecting Concentration:0.05-10mg/L Alcohol Analog and Digital Output Digital Out is High or Low based on a adjustable preset threshold.