A STAGE-ACTIVATED TRIGGERING DEVICE FOR AUTOMATIC PUMPING SAMPLERS1 |
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| Authors: | Donald J. Turton Parker J. Wigington Jr. |
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| Affiliation: | 1. Senior Agriculturalist (Forest Watershed Lab), Oklahoma State University, 013 S. Ag Hall, Stillwater, Oklahoma 74078.;2. Assistant Professor (Forest Hydrology), Dept. of Forestry, Oklahoma State University, 013 S. Ag Hall, Stillwater, Oklahoma 74078. |
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| Abstract: | 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. |
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| Keywords: | pumping samplers water quality sampling water samplers |
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