| 摘要 |
PROBLEM TO BE SOLVED: To detect pressure of a fluid flowing in a fluid supply pipe line without an error, even when air is inflated or deflated by a temperature change. SOLUTION: This fluid pressure detector is provided with a cylinder body 10 having a first cylinder 11 with one end connected to the fluid supply pipe line where the fluid flows, and a second cylinder 12 communicated with the other end of the first cylinder 11, a piston body 50 having a first piston 51 inserted into the first cylinder 11 to allow advance and retreat, and a second piston 52 provided integrally with the first cylinder 11 and inserted into a second cylinder 12, and an atmosphere-opened route 40 for opening a second cylinder chamber 12a to the atmosphere when the piston body 50 is retreated, and air compression inside the second cylinder chamber 12a varied when when the piston body 50 is advanced is detected to detect the pressure of the fluid flowing in the fluid supply pipe line. COPYRIGHT: (C)2005,JPO&NCIPI
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