| 摘要 |
PROBLEM TO BE SOLVED: To enable the highly accurate fixation of a suction piece for obtaining a magnetic suction force included in a pressure fluctuation removing means to a holding body therefore to a gas meter main body by simple work. SOLUTION: The gas channel of a gas meter main body is provided with a pressure fluctuation removing means 37 along the passage of gas and a fluidics flowmeter in this order. One end part 112 of a connecting rod 70 is rockably mounted to a valve body 42, which can be seated on a valve seat 82, and the other end part is connected to a diaphragm 43. The diaphragm 43 brings the valve body 42 close to the valve seat 82 as the differential pressure between pressure upstream from a valve hole 41 and pressure on the side of a discharge opening of gas is reduced. A plurality of supporting pieces 261 made of a synthetic resin each comprise both a circumferential surface surpassing part 264 which elastically comes into surface contact with the inner circumferential surface of the suction piece 74 and a face supporting part 265 which comes into surface contact with one face of the suction piece 74, match the suction piece 74 with the axis 23 of the connecting rod 70, and accurately position and fix it along the axis 23.
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