The Kaub gauge on the Rhine is an exciting topic when considering the water levels of the Rhine and their significance for shipping. It is located between Rüdesheim and Mainz and serves as an important measuring station to monitor the water level of the Rhine. This gauge plays a crucial role in inland navigation, as ships can be loaded differently depending on the water height.

Measurements at Kaub began for the first time in 1856 using a staff gauge.
The gauge tower was inaugurated on May 18, 1905, with a recording gauge.
It has been electric since 1951.