Digital Water Clock

The image in the water changes every minute, and will always show the exact time.
The water clock displays a digital readout of time as measured by bubbles occuring on the water's surface that have been created by a grid of sprayers. The digital water clock provides the exact time by means of a device that receivessignals from an atomic clock. Creating such an innovation as the digital water clock initially required close cooperation between Rinus Roelofs, the Noordelijke Hogeschool Leeuwarden (Institute of Technology, Department of Engeneering), the Technologie Centrum Noord-Nederland and Hoekstra Suwâld Installatie & Techniek & Solar BV.