The robust KLL-Light is characterised by its simple, fast and reliable data acquisition. The water contact signalises the KLL Light both visually by means of a LED and audibly by a buzzing sound. Also, the battery condition is indicated by a multi-colored LED, whereas the KLL-Light is particularly efficient owing to its low power consumption. However, what is decisive for the KLL-Light, is the lightweight supporting frame made of polycarbonate, which significantly simplifies the handling.