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Sensitive material of MQ-8 gas sensor is SnO2,which
with lower conductivity in clean air.When hydrogen
gas exists,the sensor’s conductivity gets higher along
with the gas concentration rising.Users can convert
the change of conductivity to correspond output
signal of gas concentration through a simple circuit.
MQ-8 gas sensor has high sensitivity to hydrogen gas,
also has anti-interference to other gases.This sensor
can detect hydrogen,especially city gas.It is a kind of
low-cost sensor for kinds of applications.