To provide a differential pressure detector which prevents influence of tightening when the detector is assembled, and prevents a change in the output of a measured value.
A sealing liquid for high pressure and a sealing liquid for low pressure sealed with a first sealing diaphragm and a second sealing diaphragm are arranged on two side surfaces of a body 12, a flange 13 for high pressure and a flange 14 for low pressure are placed at positions being opposed to individual seal diaphragms respectively, and a differential pressure detector 1 provided with a detecting element 40 is obtained for detecting the pressure difference between the sealing liquids. The flanges 13, 14 are united and fixed via a plurality of spacer members 30 formed longer than the thickness of the body 12, and the body 12 and the flanges 13, 14 are supported respectively via O rings. Since the body 12 is prevented from being strained and so on when each of the flanges 13, 14 is united and fixed, a change in the output of the measured value generated by an influence of local strains of the body 12 can be prevented.
KAIZE FUMIO
ABE SHOICHI
NEZU TAKASHI
