MQ3 Alcohol - Ethanol Sensor Module

The MQ3 Alcohol-Ethanol Sensor Module is a high-quality, reliable sensor designed to detect alcohol concentration in the air. It is ideal for a variety of applications, including breathalyzers, alcohol detectors, and other safety systems.

Key Features

• High sensitivity to alcohol and small sensitivity to benzine.
• Fast response and recovery characteristics.
• Stable and long lifespan.
• Simple drive circuit.
• Low cost and compact size.

Technical Specifications

• Operating Voltage: 5V
• Detection Range: 10ppm-1000ppm Ethanol
• Heating Resistance: 31Ω±3Ω
• Heating Current: ≤180mA
• Heating Voltage: 5.0V±0.2V /1.5±0.2V
• Heating Power: ≤900mW
• Response Time: ≤10s (70% Response)
• Recovery Time: ≤30s (70% Response)

Connection mode

1. VCC: Positive (5 v)
2. GND: Connect power negative
3. DO: TTL switch signal output
4. AO: Analog signal output

Possible Applications

• Breathalyzers: For detecting alcohol concentration in a person's breath.
• Alcohol Detectors: For monitoring alcohol levels in various environments.

• Safety Systems: Can be integrated into safety systems to detect alcohol levels and trigger alarms.