Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1988-11-08
1990-05-29
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324690, G01R 2726
Patent
active
049298852
ABSTRACT:
A method of measuring the moisture content of soil wherein a tapered probe is inserted into a tapered hole formed in the ground. The walls of the hole are tapered substantially in correspondence with the taper of the probe and such that the soil adjacent the walls is not compacted or otherwise affected. In this manner, good contact between the surface of the probe and the soil is obtained. The probe is a capacitance sensing probe with a pair of spaced electrodes along the tapered surface with a dielectric material in between. The electrodes serve as structural members of the probe body and the hollow internal portion is backfilled to prevent moisture from permeating the probe.
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Eisenzopf Reinhard J.
Harvey Jack B.
Troxler Electronic Laboratories, Inc.
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