Electricity: measuring and testing – Electrolyte properties – Using a conductivity determining device
Patent
1995-05-05
1997-08-19
Wieder, Kenneth A.
Electricity: measuring and testing
Electrolyte properties
Using a conductivity determining device
324204, 324225, 336 84M, 336 84C, G01N 2707
Patent
active
056592515
ABSTRACT:
A highly accurate electromagnetic-induction-type conductivity and dielectric constant meter is obtained by using a calibration box (instrument) and a structure as below. The conductivity and dielectric constant meter employs an electromagnetic inductive probe which includes a primary transformer composed of a toroidal core with a wound primary coil, a secondary transformer composed of a toroidal core with a wound secondary coil, an electrostatic shield shielding the transformers, and cables that connect the probe to a meter. To eliminate the electrostatic capacity produced by causes other than electromagnetic induction, the structure of the probe is symmetrical. In a first embodiment, the secondary transformer is placed between two parts of the primary transformer, which has two cores of the same shape that are placed symmetrically. The structure, including the primary and secondary transformers, gaps in the electrostatic shields, and cables, are symmetrical with respect to a plane perpendicular to the central axis of the ring shapes and passes through the center of the annular core of the secondary transformer.
REFERENCES:
patent: 3030573 (1962-04-01), Yamashita et al.
patent: 3375511 (1968-03-01), Trimble
patent: 3867688 (1975-02-01), Koski
patent: 4220920 (1980-09-01), Gross
patent: 4282487 (1981-08-01), Warren et al.
patent: 5157332 (1992-10-01), Reese
patent: 5268642 (1993-12-01), Uchidomi
"Measurement Of Humidity And Moisture Content And Monitoring Of Environment" Jpn Soc of Mech. Engr, Gihodo Co. Sep. 25, 1992, pp. 282, 283 (w/translation).
"A Miniature Conductivity Meter"; Australian Journal of Instrumentation & Control., vol. 31, No. 1 Resmar et al.
Hewlett--Packard Company
Solis Jose M.
Wieder Kenneth A.
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