Van Veen grabs Manual Meet the difference Royal Eijkelkamp Nijverheidsstraat 9, 6987 EN Giesbeek, the Netherlands

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Description The stainless steel Van Veen grabs are used for taking disturbed samples from the bottom of lakes, rivers, etc. Various versions are available. The smaller versions are manually operated. Soil type The Van Veen grab can be used for sampling the top layer of consolidated sediment consisting of silt and/or sand. The Van Veen grab is not suitable for the sampling of hard or extremely soft top layers. In the former case there is a high probability of no sample being taken and in the latter there is a chance that the grab will dig too deep, in which case a sample will be taken but not...

Operation All Van Veen grabs operate in the same way. At the surface the jaws are opened and fixed into position using a catch. The Van Veen grab must be lowered slowly and steadily to prevent the catch from being released too early (difficult on a boat that is moving about in rough water). Sediment residues on the outside of a closed (and empty) Van Veen grab indicate that the sampler was closed too early. There are holes in the jaws so that air can escape while the sampler is being lowered and water can escape while the sample is being taken. As soon as the jaws make contact with the bottom...