P3.02-1 Multisampler The sampling of residual substances and chemicals requires special characteristics regarding shape and design of the sampler as well as regarding the quality of the material that is used to construct the sampler. The multisampler has been developed for sampling of wet, solid as well as fluid material. The apparatus is part of a complete set of sampling equipment. 12.42 Multisampler, rod operated, set for sampling to a depth of 5 m The standard set is suitable for sampling up to a depth of 5 meter. Using the multisampler it is possible to take anaerobe samples in a wide variety of wet materials, solid as well as fluid. Using the piston rod (usually extended by means of a wire-line) it is possible to move the piston in the sampling tube while this tube is held stationary. In this way the original stratification of the sampled material is maintained. After the cutting head with ball valve has been fitted, this quality is maintained to a certain degree. However, in very heterogeneous substances separation will occur in addition to disturbance. Because of the correcting effect of the piston the irritating phenomenon of compaction of the sample is prevented. Applications The multisampler has been developed to sample open water, water purification basins, settling tanks, crystallization basins, sewage systems and waterbottoms, for biological, physical and chemical research. If the sampling tube is fitted with a sharp cutting head, then it is possible to sample more resilient material such as wet sand, manure, thick sludge and gels. Applying the cutting head in combination with a ball valve allows for sampling of (viscous) fluid material such as water, sewage sludge, sludge or slurry.