MQ-3 Alcohol Detector Gas Sensor Module

MQ-3 Alcohol Detector Gas Sensor Module

Alcohol Gas Sensor MQ3 is a low-cost semiconductor sensor which can detect the presence of alcohol gases at concentrations from 0.05 mg/L to 10 mg/L. The sensitive material used for this sensor is SnO2, whose conductivity is lower in clean air. It’s conductivity increases as the concentration of alcohol gases increase. It has a high sensitivity to alcohol and has good resistance to disturbances due to smoke, vapour and gasoline. This alcohol sensor is suitable for detecting alcohol concentration on your breath, just like your common breathalyzer.

Features :

• Signal output light indicator.
• Analog and level signal output.
• TTL output valid signal is low.  (When the output low signal light can be directly connected microcontroller or relay module).
• The carbon monoxide detection with better sensitivity.
• It has a long service life and reliable stability.
• Rapid response recovery features.

Specifications:

• Concentration                : 0.05 mg/L to 10 mg/L Alcohol
• Operation Temp.           : -10°c – +70°c
• Main Chip                       : LM393
• Operating Volt               : 5V
• Load Resistance            : 200 kΩ
• Current Consumption  : 150mA