| 摘要 |
PURPOSE:To remove dusts through the operation of a pump in case a choking occurs in a pore, by a method wherein, in a Coulter counter, a nozzle of a pipe for removing a choking is located in the proximity of a pore. CONSTITUTION:With a pressure reducing pump 7 started, silver surfaces 9a and 9b of a manometer 8 are deflected, and a sample liquid 3 in a receptacle 1 is fed in a fine particle detector 24 and a pressure reducing pipe 5. A cock 6 is then closed, and the specified volume of the sample liquid 3 is sucked in a detector 24 as a result of the movement of the silver surfaces. The sample liquid 3 passes through pores 25, and blood cells 2 are detected as a pulse at a detecting circuit 13 by electrodes 26a and 26b. In case a choking occurs in the pores 25, the detecting circuit 13 is prevented from generating a pulse, and thereby a counting operation is brought to a stop to actuate a removing pump. This causes a pipe 27 to start sucking the sample liquid 3 by means of a nozzle 27a and to suck dusts by which the pores 25 and choked. |
