DIAPHRAGM BODY, DIFFERENTIAL PRESSURE MEASUREMENT UNIT, LIQUID AMOUNT ESTIMATION DEVICE, AND LIQUID AMOUNT ESTIMATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a diaphragm body capable of preventing content leakage of a case and preventing a pressure measurement object from penetrating into the case even when a crack occurs in a connection place between the case of the diaphragm body and a diaphragm, a differential pressure measurement unit, a liquid amount estimation device, and a liquid amount estimation system.;SOLUTION: A gas phase diaphragm part 40 has a case 41 provided with an opening 41a, and a diaphragm 42 provided and joined to the case 41 so as to close the opening 41a. Further, the gas phase diaphragm part has a first leakage prevention film 47 provided in a closely overlapped manner on the case 41 and the diaphragm 42 so as to cover a connection portion R1 of the case 41 and the diaphragm 42.;COPYRIGHT: (C)2013,JPO&INPIT