- • Detection Gas: toluene, acetone, alcohol, hydrogen
- • Detection Range: 5～500ppm VOC
- • Application: It is widely used in domestic VOC gas alarm, industrial VOC gas leakage alarm and portable VOC gas detector.
- Principle Introduction:
Manufacture air quality sensor and VOC sensor MQ-138 for IAQ monitor application.
Sensitive material of MQ-138 gas sensor is SnO2, which with lower conductivity in clean air. When VOC 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-138 gas sensor has high sensitivity to toluene, acetone,alcohol,methanol,also can monitor hydrogen and other organic vapour well. It can detect kinds of organic gases and is a kind of low-cost sensor for kinds of applications.
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