Description:
MQ-3 gas sensor is a sensitive material used in clean air, low conductivity tin dioxide (SnO2). When the sensor is present in an environment in which the alcohol vapor, the sensor's conductivity increases with the concentration of alcohol gas in the air increases. Using a simple circuit can be converted to the change in conductivity of the gas concentration with the corresponding output signal. MQ-3 gas sensors with high sensitivity to alcohol, and gasoline can resist, smoke, and water vapor interference.
This sensor can detect various concentrations of alcohol atmosphere and is a low-cost sensor for a variety of applications.
- With power indication and TTL signal output indication
- With Digital DO open signal (TTL) output and AO analog output.
- Electrical properties: Input voltage: DC 5V; Power consumption (current): 150mA.
- DO output: TTL digital quantity 0 and 1 (0.1 and 5V).
- AO output: 0.1~0.3V.
- Maximum concentration voltage: About 4V.
- Preheat time: 20s
Application:
- Alcohol (ethanol) detection
- Car alcohol alarm
- Breathalyzer
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