Description
The gas sensing material used in the MQ-3 gas sensor is tin dioxide (SnO2), which has a low conductivity in clean air. When there is alcohol vapor in the environment where the sensor is located, the conductivity of the sensor increases with the increase in the concentration of alcohol vapor in the air.
Features
- Sensitive for alcohol, ethanol
- Output voltage boosts along with the concentration of the measured gases increases
- Fast response and recovery
- Adjustable sensitivity
- Signal output indicator
Specification
- Power: 2.5V ~ 5.0V
- Dimension: 40.0mm * 21.0mm
- Mounting holes size: 2.0mm
Pinouts
| PIN | Description |
| DOUT | Digital data output |
| AOUT | Analog data output |
| GND | Ground |
| VCC | Power input (2.5V~5.0V) |
