Description

• This module is made using Alcohol Gas Sensor MQ3.
• It 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 increases.
• It has high sensitivity to alcohol and has a good resistance to disturbances due to smoke, vapor and gasoline.
• This module provides both digital and analog outputs.
• Threshold level for digital output can be easily adjusted using the preset on the board.
• MQ3 alcohol sensor module can be easily interfaced with Micro-controllers, Arduino Boards, Raspberry Pi etc.
• Operating Voltage : 5V ±0.1 
• Current Consumption : 150mA
• Digital Output: TTL digital quantity 0 and 1 (0.1 and 5V).
• Analog Output: 0.1~0.3V.
• Concentration : 0.05 mg/L ~ 10 mg/L Alcohol
• Operation Temperature : -10°C ~ 70°C

Features

• Low Cost
• Fast Response
• Stable and Long Life
• Good Sensitivity to Alcohol Gas
• Both Digital and Analog Outputs
• On-board LED Indicator

Pin Out

• VCC: Input Power Supply
• GND: Supply Ground
• DO: Digital Output
• AO: Analog Output

Package included:

• 1 x MQ-3 Alcohol, Ethanol Sensor Module