| 摘要 |
PROBLEM TO BE SOLVED: To provide a particle size distribution measuring instrument provided with circulation structure useful for regulating automatically concentration of granules in a dispersive medium. SOLUTION: This measuring instrument is provided with a liquid level detecting means 10 for detecting a liquid level of a suspension 1a in a circulation bath 11 at at least a large number of points, and a control means 110 for controlling injection of the dispersive medium 3a and/or draining of the suspension 1a, based on a detection signal S from the liquid level detecting means 10. COPYRIGHT: (C)2006,JPO&NCIPI
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