| 摘要 |
PROBLEM TO BE SOLVED: To achieve a bellows differential pressure type pressure switch capable of preventing generation of detection errors based on changes of environmental pressure of a low pressure chamber, and to provide a pressure detection system. SOLUTION: In the bellows differential pressure type pressure switch forming the low pressure chamber 401 and a high pressure chamber 402 by partitioning the inside of a differential pressure container 403 and responding to displacement of a pressure-receiving displacement body 420, the pressure-receiving displacement body is combined with an opening at a pointed head of a cylindrical bellows 421 so as to close the opening at the pointed head of the bellows expanded and contracted from the high pressure chamber to the low pressure chamber. The response switch includes a permanent magnet 423 mounted on a peripheral wall of a recessed section of a bellows pointed-head sealing member 422, and a reed switch 425. A bellows extension adjustment spring 427 is arranged between a bottom wall 422c of the recessed section of the bellows pointed-head sealing member and an adjustment screw 426 engaged to pass through a wall 403a of the differential pressure container at an airtight state. COPYRIGHT: (C)2011,JPO&INPIT
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