A porous cup soil-water sampler with volume control
1977
CHOW, T. L.
The design, construction, and application of an inexpensive, mercury-pressure control device, designed for use in combination with the constant vacuum, porous cup, soil-solution sampler, are given. This unit has the capability to shut off the constant pressure source when a predetermined volume of water has been collected. The newly designed assembly inherits all the advantages of the original design, and eliminates the contamination resulting from overfilling of sample bottles and the influence of soil volume.
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