| 摘要 |
PROBLEM TO BE SOLVED: To improve the workability of grinding a sealing-ring-fastening surface and substantially improve pressure measurement performance, quality, and product yields by eliminating damage and fouling to a pressure-sensitive part and failures in grinding the sealing-ring-fastening surface. SOLUTION: An outer-circumferential-side flange part 5A having the sealing-ring-fastening surface 5a is formed separately from an inner-circumferential-side flange part 5B formed integrally with a case main body 3 within a ring-like flange part 5 protruding outward from the case main body 3. By mirror-finishing the sealing-ring-fastening surface 5a of the separately formed outer-circumferential-side flange part 5A by grinding and integrally joining the outer-circumferential-side flange part 5A to the inner-circumferential-side flange part 5B, an electrostatic capacitance type pressure gauge 1 having the ring-like flange part 5 having a prescribed protrusion width is assembled and constituted. COPYRIGHT: (C)2007,JPO&INPIT
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