MQ-3 Alcohol Gas Sensor Module

An alcohol sensor is capable of detecting alcohol (ethanol) particles on itself and gives the information in digital form back to us to manipulate it.  Gas sensor has high sensitivity to alcohol, and has good resistance to disturbances of
gasoline, smoke and vapor. The sensor could be used to detect alcohol with different
concentration; it is with low cost and suitable for different application. Sensitive material of
MQ-3 gas sensor is SnO2, which with lower conductivity in clean air. When the target alcohol
gas exists, sensor’s conductivity is proportional to the gas concentration.

Key features

• Voltage: 5V DC
• Power: max 750mW
• Measurement range: 0.04-4mg/L