Alcohol Gas Sensor MQ-3
Alcohol Gas Sensor MQ-3
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Description: This alcohol sensor is suitable for detecting alcohol concentration on your breath, just like your common breathalyzer. It has a high sensitivity and fast response time. Sensor provides an analog resistive output based on alcohol concentration. The drive circuit is very simple, all it needs is one resistor. A simple interface could be a 0-3.3V ADC.
Please review the datasheet for conversions to ppm then Wikipedia.org for BAC.
Features:
- 5V DC or AC circuit
- Requires heater voltage
- Operation Temperature: -10 to 70 degrees C
- Heater consumption: less than 750mW
Dimensions:
- 16.8mm diameter
- 9.3 mm height without the pins
Documents:
- Datasheet
- Arduino Tutorial in Portuguese
- Wiring Example
- Arduino Breathalyzer
- Another Breathalyzer
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