| 摘要 |
PROBLEM TO BE SOLVED: To obtain a measuring apparatus by which the water quality such as the pH or the like of drainage can be measured with good accuracy. SOLUTION: A pH measuring apparatus 20 is arranged in a position in which algae 30, dirty things or the like flowing into from an inflow pipe 22 are not stuck directly by partitioning the inside of a storage tank 21 by using a partition plate 24. An outflow pipe 23 is opened in the bottom of the storage tank 21 on the side of the pH measuring apparatus 20, and an overflow pipe 26 is installed in the upper part. Drainage which flows into from the inflow pipe 22 is discharged from the outflow pipe 23 and the overflow pipe 26, and the drainage around the pH measuring apparatus 20 is replaced through the lower part of the partition plate 24. On the side of the inflow pipe 22, the algae 30 or the like surface on the surface of the water, and they are discharged from the overflow pipe 26. In addition, a lid 29 is closed, and light which is incident on the storage tank 21 can be cut off. When the light is cut off, the photosynthetic activity of the algae 30 is stopped, and it is possible to suppress a rise in a pH measured value due to reduction in carbonic acid in the drainage. |
