The company independently developed a variety of piezoresistive pressure-sensitive chips, with pressure measurement ranges ranging from 1KPG to 5MPA. They were processed using 6-inch or 8-inch MEMS production lines. The pressure-sensitive chips consist of an elastic membrane and four resistors integrated onto the membrane. The four pressure-sensitive resistors form a Wheatstone bridge structure. When pressure is applied to the elastic membrane, the bridge will generate a voltage output signal that is linearly proportional to the applied pressure. It has excellent linearity, repeatability, and stability, as well as high sensitivity. This makes it convenient for users to use operational amplifiers or integrated circuits to debug the output. It is suitable for oil-filled isolation and various simple packaging pressure sensors.