| 摘要 |
A tube-type sample supplying portion 1 is provided upright above a classification tank 2. A sample inlet pipe 5, which communicating with a culture tank 3, is connected to the lower part of the sample supplying portion 1. An outlet pipe 6, which communicating with the culture tank 3, is connected to the upper part of the sample supplying portion 1. A sample feed pump 4 and a valve 7 are positioned in one of the flow passages between the outlet pipe 6 and the culture tank 3. The flow speed of the fluid including the sample in the sample supplying portion 1 is set to a speed being only a little faster than the final sinking speed of lumps of immature cultivated cells in the fluid.
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