| 摘要 |
PURPOSE:To prevent effect caused by electrical disturbance, by providing a bypass flow passage selealed with a solution having low electric resistance apart from a flow passage for supplying a solution to be measured so as to communicate with said flow passage. CONSTITUTION:A bypass flow passage 16 communicating with a flow passage 12 for supplying a solution to be measured is provided to the flow passage 12 at positions on the inlet and outlet sides thereof and sealed with a solution 19 having electric resistance lower than that of the solution to be measured. The current flowing to the solution to be measured by electrical disturbance cause is bypassed through the solution 19 having low electric resistance in the bypass flow passage 16 and, therefore, no potential difference is generated between a comparing electrode 13 and an indication electrode 14. By this method, the effect caused by electric disturbance is prevented and no error is generated in the measurement of ion concn. |
