| 摘要 |
PURPOSE:To attain to enhance the accuracy of a measured value and to prevent the adhesion of a substance to a measuring electrode by mixing a liquid in the vicinity of the measuring electrode, by providing a bimorph vibrator in the vicinity of the measuring electrode while connecting an AC power source to said vibrator. CONSTITUTION:When AC voltage of about 10-150Hz is applied to a bimorph vibrator 4, the vibrator 4 is vibrated at the central part thereof at the frequency thereof. The pressure wave generated by this vibration is different from ultrasonic vibration and comes to a relatively large pressure wave by the bimorph vibrator. This pressure wave is impinged to an electrode 1 to prevent the contamination thereof or formation of a substance adhered to said electrode 1 and mixing effect caused by relatively large vibration is generated. In addition, amplitude can be made large by bring the back side of the vibrator 4 into communication with the open air through an air passing pipe 8 and can be easily altered by inserting a throttle valve 9 into the air passing pipe 8. By vibrating the vibrator 4 as mentioned above, a liquid is sufficiently mixed to make it possible to enhance the accuracy of a measured value and the formation of a substance adhered to the electrode 1 can be prevented. |
