MQ-3 Gas Sensor
Detect alcohol concentration with analog and digital outputs
- Power supply: 2.5 V to 5 V
- Analog output: A0
- Digital output: D0
- Pins: Goldpin connectors, 2.54 mm pitch
- Board sizes: 40 x 21 mm
- Mounting holes: 2 mm diameter
Top Features:
- Sensitive for alcohol, ethanol
- Output voltage boosts with gas concentration
- Fast response and recovery
- Adjustable sensitivity
The sensor determines the concentration of alcohol in the air by measuring the voltage on the analog output. It can be powered with a voltage range of 2.5 V to 5 V. The MQ-3 sensor has both digital and analog outputs, making it compatible with popular commissioning modules like Raspberry Pi and Arduino.
The digital output D0 has a potentiometer to set the threshold for status change from high to low. It can be connected directly to a microcontroller or commissioning set. The analog output A0 must be connected to an A/D converter pin in Arduino for more accurate alcohol level measurement.
Operating principle: MQ-3 gas sensor uses SnO2 as a gas-sensing material. In the presence of alcohol gas, the sensor's conductivity increases with higher gas concentration.
Package Includes:
- 1 x MQ-3 Gas Sensor
- 1 x 4-pin custom connector jumper wire
* Images are for illustration only; actual product may vary.