Fujikoki Corporation

Jun-ichi Miyano

Keiji Sasaki

Akira Sawada

A pressure sensor,comprises a metallic housing,having a space,communicated to a pressure detection space and a thin rising portion,formed on the upper end of the peripheral area, a sensor element,, a sensor element holder,, a metallic pressure case,having a ceiling portion,, and a connector case,formed of an insulating material, wherein a collar portion,of a base plate,of the sensor element,including a pressure sensing element,is contacted to an annular protrusion,positioned around the opening,of the sensor element holder,, and the collar portion,is airtightly welded to the annular protrusion,by projection welding. Further, the collar portion,on the pressure case,and the peak surface,of the holder,is airtightly welded by an electron beam welding. The airtight interior space defined by the sensor element,, the sensor element holder,and the pressure case,is utilized as the reference pressure space.

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Tokyo, Japan

Jun-ichi Miyano