Pressure sensor including increased processing precision

A pressure sensor comprising:

• a housing including an upper housing part comprising a base and a cylindrical end, and a lower housing part, the upper housing part and the lower housing part configured with a chamber there between;
• a diaphragm between the upper housing part and the lower housing part, and dividing the chamber into an upper chamber and a lower chamber;
• a magnetic core linked to the diaphragm;
• an operating spring including a top end and a bottom end, the top end supported against the cylindrical end of the upper housing part and the bottom end supported against the magnetic core;
• wherein at least one of the top end and the bottom end of the operating spring is bonded by an adhesive;
• a coil mounted to the upper housing part, the coil working in coordination with the magnetic core to form a variable inductance sensor, wherein the coil comprises a plurality of coil layers;
• and
• an adhesive layer extends axially along the cylindrical end between at least two adjacent coil layers of the plurality of coil layers, or between at least one coil layer of the plurality of coil layers and the cylindrical end.