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This project uses MQ-7 gas sensor for detecting the Carbon monoxide level in the gas.
MQ-7 gas sensor has high sensitivity to carbon monoxide. The sensor could be used to detect alcohol with different concentration, it is with low cost and suitable for different application.
Principles
Sensitive material of MQ-7 gas sensor is SnO2, which with lower conductivity in clean air. When the target carbon monoxide gas exists, The sensor’s conductivity is more higher along with the gas concentration rising.
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