| 摘要 |
PURPOSE:To speedily detect a clog by providing an air hose, a nozzle chip, and a sample tube and monitoring the pressure in the air hose. CONSTITUTION:While the liquid sample in the sample tube 16 is sucked and sampled, negative pressure is produced in the air hose 12 and drops gradually with time. Then when the intake of the nozzle chip 14 is closed owing to th suction of a solid body in the sample, the internal pressure in the air hose 12 does not returns to the atmospheric pressure and a sudden drop in the internal pressure occurs on the blocking occurrence. For the purpose, the internal pressure level of the air hose 12 which varies with suction time is sampled at a specific period while the liquid sample in the tubed 16 is sampled to detect the blocking state of the intake of the chip 14 speedily. Then the sucking operation is stopped at the same time the liquid sample which is sucked is discharged slightly immediately to separate a sucked material from the intake of the chip 14, thereby obtaining only the desired pure liquid sample. |
