@inbook{cd8e99b427f44d2b80318e9cb5bab54d,
title = "A semi-automatic level-accurate groundwater sampler",
abstract = "Large resources are spent in the chemical analysis of groundwater quality. Therefore, great care should be taken to make accurate sampling. Many types of sampling equipment based on pumpage between packers are available. However, fissured rock or gravel pack outside the screen may result in innow of water from a different level than the packed level. However, this paper describes a groundwater sampler of the packer type which will sample groundwater from a usually screened interval of a well, guaranteeing level representativity. The sampling procedure involves pumping from separated intervals above and bolow the sampled interval. The pumpage produces a simultaneous flow of water to an innatable sampling vessel, installed within and totally separated from the flow through the pumping system. As distinct from earlier groundwater samplers of the packer type the described sampler is able to sample level-accurate groundwater from a usually screened well or open borehole penetrating an aquifer.",
author = "Andersen, {Lars J{\o}rgen}",
year = "1979",
month = nov,
day = "1",
doi = "10.22008/gpub/38280",
language = "English",
isbn = "87-421-1111-1",
series = "DGU {\AA}rbog",
publisher = "DGU",
pages = "165--171",
booktitle = "DGU {\AA}rbog 1978",
}