| 摘要 |
PROBLEM TO BE SOLVED: To enable the accurate containment of pressure loss within a predetermined range at the time of a small quantity of flow in a pressure fluctuation removing means. 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 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. Regulating members 158 with a plurality of thickness t1, t2, and t3 are selectively provided between the valve body 42 and a multi-leveled receiving part 116. Each of the thickness t1, t2, and t3 is different from one another by 0.3 mm.
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