Patent ID: 6186009
Filing Date: 2001-02-13
Classification: G01L

Abstract:
A pressure sensor comprising:a housing made of metal material, said housing defining an inner area of said pressure sensor;a semiconductor pressure sensing element positioned in said inner area of said housing for sensing pressure;a pressure sensing element mounting member having an opening; anda stem having an opening,wherein said housing comprises:a liquid induction portion having a liquid induction hole, said liquid induction hole having an opening to said inner area of said housing; andan annular protrusion formed on said housing surrounding a periphery of said opening of said liquid induction hole,wherein said pressure sensing element is fixed airtightly to said stem through said pressure sensing element mounting member,said stem is fixed airtightly to a top surface of said protrusion of said housing, andsaid opening of said pressure sensing element mounting member and said opening of said stem are connected to said liquid induction hole.