Measuring and testing – Moisture content or absorption characteristic of material
Patent
1995-01-19
1997-07-08
Cuchlinski, Jr., William A.
Measuring and testing
Moisture content or absorption characteristic of material
7315254, G01N 710
Patent
active
056449470
ABSTRACT:
A portable tensiometer to in situ determine below-grade soil moisture potential of earthen soil includes, a) a body having opposing first and second ends and being adapted for complete insertion into earthen soil below grade; b) a porous material provided at the first body end, the porous material at least in part defining a fluid chamber within the body at the first body end, the fluid chamber being fluidically sealed within the body but for the porous material; c) a degassed liquid received within the fluid chamber; d) a pressure transducer mounted in fluid communication with the fluid chamber; e) the body, pressure transducer and degassed liquid having a combined mass; f) a flexible suspension line connected to the body adjacent the second body end, the flexible line being of sufficient strength to gravitationally freely self suspend the combined mass; and c) the combined mass being sufficient to effectively impart hydraulic communication between below-grade earthen soil contacted by the porous material under the weight of the combined mass. Tensiometers configured to engage the sidewalls of an earthen opening are also disclosed. Methods of taking tensiometric measurements are also disclosed.
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James, M. L., et al., Applied Numerical Methods for Digital Computation, (3rd), Harper & Row, NY, pp. 86-93.
Hubbell Joel M.
Sisson James B.
Cuchlinski Jr. William A.
Lockheed Idaho Technologies Company
Worth Willie Morris
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