MQ3 Gas Sensor Alcohol Module Detector 4 Pin

MQ3 Gas Sensor alcohol sensor is suitable for detecting alcohol concentration in your breath, just like your common breathalyzer. The sensor provides an analogue resistive output based on alcohol concentration. When the sensor is present in the environment in which the alcohol vapour, the sensor’s conductivity increases with the concentration of alcohol gas in the air increases. Using a simple circuit can be converted to the change in conductivity of the gas concentration with the corresponding output signal.

MQ3 Gas Sensor Features:

• High-quality double panel design, with power indicator and TTL output signal
• Have DO switch signal(TTL) output and AO analogue signal output
• TTL output signal for low level effectively. (when the low output electric signal lights at ordinary times, can be directly connected single-chip microcomputer or relay module)
• Analogue output voltage with concentration, the higher concentration, the higher voltage
• Has better sensitivity to the liquefied petroleum gas, natural gas, city gas, smoke
• Has long service life and reliable stability
• Rapid response recovery features

MQ3 Gas Sensor Specifications:

• Input voltage: DC5V
• Power consumption (current) : 150 mA
• DO output: TTL digital 1 and 0 (0.1 and 5 V)
• AO output: 0.1-0.3 V (pollution-free)
• The highest concentration of voltage: Approx 4 V
• Detection range of alcohol: detection range of 10 ~ 1000 PPM

MQ3 Gas Sensor Pin Description:

• VCC: Positive (5 v)
• GND: Connect power negative
• DO: TTL switch signal output
• AO: Analog signal output

Package Included:

1 x MQ-3 MQ3 Alcohol Sensor Module Breath Gas Detector Ethanol Detection