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| Element | Description | Element Code | Essential | Uniclass 2015 |
|---|---|---|---|---|
| Stilling Tube | A tube fixed to the bank of a watercourse, which extends down into the water. Perforations in the submerged tube allow the water level to rise and fall at the same time as the water body, but without turbulence. This allows for more accurate measurement of water level. | STB | No | Pr_75_50_47_85 |