| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluid vibration type flowmeter which can sufficiently remove impurities contained in a fluid. SOLUTION: A passage on the upstream side of a nozzle passage 210 is provided with a rectangular groove 204 formed in the form of a recess in the direction of letting a fluid contact a side wall part 202a of the passage and the rectangular groove 204 has a pair of side wall surfaces 204a facing each other, an inner wall surface 204b linking the inner part of the side wall surfaces 204a and a curved wall surface 204c formed so curved to link the inner wall surface 204b and each of the side wall surfaces 204a. The rectangular groove part 204 is provided with a porous member 61 at the position of the side wall surfaces 204a to sufficiently remove impurities contained in the fluid by the porous member 61.
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