Frankstar Self-contained Tide Gauge ni uburyo bwo gupima amazi n’ubushyuhe bw’amazi buciriritse, bukoreshwa mu kugenzura neza urwego rw’amazi n’ubushyuhe. Ikoresheje uburyo bwo kumenya neza igitutu gishingiye ku buryo buhanitse, itanga uburyo bwo kureba amazi n’ubushyuhe mu gihe kirekire mu migezi, mu biyaga no mu nkengero z’inyanja kugira ngo ikoreshwe mu buryo bufatika mu bijyanye n’amazi n’inyanja.