| 摘要 |
PURPOSE:To detect the height of a wide liquid surface with high responsiveness by detecting electric current flowing into plural electrodes arranged at different levels from the liquid surface. CONSTITUTION:Between the lowermost level electrode 2 out of electrodes 2-7 with different levels from the liquid surface and other electrodes 3-7, a DC power supply 1 and light emitting diodes 12-16 are connected in parallel. Conductive liquid 19 is injected from an inlet 10 to a container 8 and is discharged from an outlet 11. In accordance with the contact of the surface of the liquid 9 with the lower ends of the electrodes 3-7, the light emitting diodes 12-16 are successively emitted, so that the height of a wide liquid surface is detected with high responsiveness. |
