HYDROGEN PRESSURE SENSOR

PROBLEM TO BE SOLVED: To provide a hydrogen pressure sensor capable of reducing detection errors caused by the infiltration of hydrogen into a component member thereof. SOLUTION: A detecting base material 10 includes a cylindrical section 16 and a diaphragm 18 blocking an opening at one end of the cylindrical section 16. The detecting base material 10 has a container shape comprising the cylindrical section 16 as a circling side wall and the diaphragm 18 as a bottom wall, and an inner wall surface of the container shape forms a pressure receiving hole 22. The hydrogen pressure sensor is fixed to hydrogen piping so that the opening in the detecting base material 10 is properly aligned with an opening formed at the hydrogen piping. The diaphragm 18 has a plurality of wall surface directional holes 24 extended from a peripheral rim surface toward the center of the diaphragm 18. A semiconductor strain gauge 14 is fixed to a sensor outer wall surface of the diaphragm 18 via an adhesive glass layer 12. COPYRIGHT: (C)2011,JPO&INPIT