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A STAGE‐ACTIVATED TRIGGERING DEVICE FOR AUTOMATIC PUMPING SAMPLERS 1
Author(s) -
Turton Donald J.,
Wigington Parker J.
Publication year - 1984
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1984.tb04727.x
Subject(s) - float (project management) , sampling (signal processing) , stage (stratigraphy) , column (typography) , calibration , streams , water column , environmental science , hydrology (agriculture) , computer science , engineering , electrical engineering , geology , marine engineering , telecommunications , physics , geotechnical engineering , paleontology , computer network , oceanography , filter (signal processing) , frame (networking) , quantum mechanics
A device to trigger automatic pumping samplers at discrete stages on headwater streams in southeastern Oklahoma was developed. The magnetic switch column employs a sequence of magnetic reed switches wired in parallel and set at 0.03 m (0.10 ft) intervals. A magnetic float inside the column closes the reed switches, therby triggering the sampler as stage rises and falls. The columns were constructed from inexpensive, readily‐available materials. Following installation and field calibration, the columns provided relaible and representative sampling during 12 storms, at three sites. The magnetic switch column may be used in a wide range of research and monitoring sites to improve water quality sampling.