A stainless steel pressure sensor core based on silicon strain gauge is designed. The stainless steel matrix as pressure sensitive unit is an integrated structure based on mechanical processing technology

which has no welding seam

no rubber ring and no leakage risk of working medium. At the same time

silicon strain gauge with high sensitivity is used to transform deformation of stainless steel sensitive unit into electrical signals. Through the built test system

the output linearity of the sensor core reaches about 0. 32 % and the performance index is excellent. The core is assembled into pressure sensor

which is widely used in various fields such as automotive electronics and industrial electronics

including various stainless steel compatible corrosive media environment.