MQ138 VOC Gas Sensor IAQ monitor Application Semiconductor

MQ138 Organic Vapor Sensor Conductivity In Clean Air

Sensitive material of MQ138 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.

MQ138 gas sensor has high sensitivity to toluene,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.

Specification Sheet: