Nilsson Depth-Integrating Suspended Sediment Sampler
NOT CURRENTLY AVAILABLE
This device, variously known as a Nilsson sampler, Uppsala-type, and Swedish sediment sampler, holds a 1 liter bottle for samples. The tube system is the essential design feature for obtaining representative samples under a variety of conditions. It works both as a point sampler and as a depth-integrating sampler. The sampler was developed in 1969 as the IHD standard for sediment sampling in Scandinavia and other countries. The Swedish Meteorological and Hydrological Institution (SMHI) early equipped all its sediment measurement stations with this sampler, and it has since been used for research and by hydrological institutions in many countries and on several continents.
This sediment sampler is the original design by Dr. Bengt Nilsson for use in the IHD project of the UN (International Hydrological Decade). Performance data are taken from:
Nilsson, B., 1969: Development of a depth-integrating water sampler. UNGI Rapport 2, 17 pp. Uppsala University, Department of Physical Geography, ISSN 0375-8109. [ pdf ]
The suspended sediment samples can be filtered on a field station as well as in the laboratory using this pressure filtration device. A hand pump of the type used for bicycles is used to create the pressure that speeds up the filtration.
The standard procedure is to weigh the filter, filter the sample, dry the filter (in 105ºC, but 65ºC has also been used), weigh it again, and subtract the filter mass for total sediment mass. If desired, the filter is ignited in an oven at 550ºC, and weighed to get the inorganic sediment mass. Divide by sample volume to get sediment concentration in g/L.