What is MOS gas sensor？

Update time : 2023-03-06 17:49:00

MOS sensors, also known as semiconductor sensors, can be divided into surface control type and volume control type according to whether the interaction between semiconductor and gas is on its surface or inside, and then can be divided into resistance type and non-resistance type according to the physical properties of semiconductor changes. MOS sensor belongs to the type of non-resistive sensor. It is a gas sensor made of the capacitance of mos diode, the change of voltage characteristics and the change of threshold voltage of mos field-effect transistor.

Working principle of MOS gas sensor: It is used to detect gas directly or indirectly according to the adsorption and reaction of gas and the change of some characteristics of semiconductor. Because the manufacturing process of this kind of sensor is mature and convenient for device integration, its performance is stable and the price is cheap, but there is also a drawback, that is, short service life.

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