The WSP7110 type hydrogen sulfide sensor adopts advanced plane production technology to form heater and metal oxide semiconductor gas sensor material on a micro Al2O3 ceramic substrate, which is led out by electrode leads and packaged in metal tube base and tube cap. When the detected gas exists, the higher the concentration of the gas in the air, the higher the conductivity of the gas sensor. This change in conductivity can be converted into an output signal corresponding to the gas concentration using a simple circuit.

MEu-H2S hydrogen sulfide gas sensor is a constant-potential electrolytic sensor. Hydrogen sulfide and oxygen undergo corresponding redox reactions at the working electrode and counter electrode and release charges to form a current. The current is proportional to the concentration of hydrogen sulfide. Can determine the level of hydrogen sulfide concentration.

The gas sensing material used in the MQ136 hydrogen sulfide gas sensor is tin dioxide (SnO2), which has a low conductivity in clean air. When there is hydrogen sulfide gas in the environment where the sensor is located, the conductivity of the sensor increases with the increase of the hydrogen sulfide gas concentration in the air. The change in conductivity can be converted into an output signal corresponding to the gas concentration using a simple circuit.

The MEMS hydrogen sulfide gas sensor is composed of a Si-based micro-hot plate made of MEMS technology and a metal-oxide-semiconductor material with low conductivity in clean air. When the detected gas is present in the ambient air, the conductivity of the sensor changes. The higher the concentration of this gas, the higher the conductivity of the sensor. The change in conductivity can be converted into an output signal corresponding to the gas concentration using a simple circuit.