hook gauge; hook gage (A)

Adjustable water-level gauge, used in the accurate measurement of the elevation of a water surface, consisting of a pointed, U-shaped metallic hook, pointing upward and which, after immersion, is raised until the point just makes a pimple on the water surface.

 

Source:

UNESCO/WMO International Glossary of Hydrology (2nd revised ed., 1992)

Posted on February 19, 2014 .