Water level - Wikipedia
Water level gauge height is the elevation of the free surface of a relative to a specified datum. [1] See also[edit] References[edit] ^ISO 772: 1996. Hydrometric determinations – ...
Water level (device) - Wikipedia
water level is a device used for matching elevations of locations that are too far apart for a to span. The simplest water level is a section of clear tubing, partially filled with water. W...