Product description
MQ-3 is a gas sensor with high sensitivity to alcohol (ethanol C2H5OH) and some sensitivity to light naphtha. The sensor features fast response time, high sensitivity, good stability, and long service life. A popular sensor with many available examples for different platforms.
Applications:
- Suitable for alcohol testers (breath analysis)
Specifications:
- Supply voltage: 5 V
- Current consumption: 150 mA
- Power: 750 mW (the sensor becomes hot during operation)
- Outputs: digital and analog
- Detection range: 100–1000 ppm
- Dimensions: 32 x 20 x 22 mm
Connections:
- AO: Analog output
- DO: Digital output
- GND: Ground
- VCC: 5 V supply voltage
