Abstract: Device for taking samples from the bottom boundary layer of a water body, consisting of compact bottom sediments, overlying water-saturated mud layer, and near-bottom water layer directly connected with the latter, belongs among oceanographic devices. Disturbance of the probes' structure is avoided by the construction of the device with several shorter tubes with their inlet holes being located at different heights, instead of one long sampling tube. There are distinctive tubes for taking samples from layers at different heights from the bottom. The sampling tube divided into sections is furnished with isolating valves that divide the interior of the tube into layers isolated from each other. Soft and regulated drop of the device is achieved using the inflatable contact belt. Using an upper inflatable balloon avoids the vertical stability of the device and raising it to the surface without cabling.

Abstract: Devices using a winch are currently used for taking samples in the boundary layer formed at the bottom of a water basin. In order to minimize the potential mixing effect at the whole length of the sampling tube, the design is presented where the sampling tube disassemble into sections is provided with horizontal valves dividing the interior of the tube into layers isolated from each other in the presented application, several shorter sampling tubes are used with their inlet holes being located at different heights. Thus, layers located at different heights are sampled by different sampling tubes. Substitution of contacts elements (shoes) with a contact surface, e.g. inflatable support belt, guarantees the stability of the sampling tube on the soft bottom. To ensure the vertical stability of the sampling tube, the device is provided with an upper stabilizing balloon.