Device for taking samples from the bottom boundary layer of a water body

Long-term changes in the marine and lake environment are well described by their bottom sediments, particularly by the profiles of these sediments. Compact bottom sediments can be sampled by different sampling devices elaborated and manufactured in tens of variants, e.g. gravity corers, vibratory corers, grab samplers, sampling boxes connected to the supporting frame, etc. The components of floating and lighter contact layers will be pushed away using these samplers, and the sample obtained will have a highly mixed structure, which cannot be used to determine the distribution of vertical, i.e. temporal, distribution of the components. In 1975 Dipl. Ing. Martin Voll started the study of pollution with aromatic hydrocarbons of the Baltic Sea and some Estonian lakes with a unique sampler allowing taking sectioned cores. The device was continuously improved and protected with a number of patents. In 1988/1989 Voll used his device during the Pacific Ocean expedition, and water decaying bacteria were found at a depth of 6000 m at the bottom of the Pacific Ocean. In this report we are lightening an improved variant of the sampler protected with a United States patent application and being in the phase of construction today.