To prevent a sealing ring from being omitted or damaged at the its attachment it to a measurement member, regarding a pressure sensor which is constituted, such that the pressure sensing part housed in the case is introduced with the pressure from the pressure inlet part, and is to be attached to a measurement member via the sealing ring.
The pressure sensor is constituted that on the attachment surface 12c, 13c of the pressure inlet part 12b, 13b for introducing pressure from the measuring member 200 to the sensing part. the ring shaped groove 140 for housing the seal ring 130 is provided, the pressure inlet parts 12b, 13b are attached via sealing ring 130 to the measuring member 200, and on the sidewall of the groove 140, protruding parts 141 are formed. The sealing ring 130 is held in the groove 140, because the parts of sealing ring are forcedly fitted to the groove 140 at the protruding parts 141.
Takahiro Miura
Fumihiro Mizuno