Electricity: measuring and testing – Electrolyte properties – Using a conductivity determining device
Patent
1989-10-13
1992-10-20
Harvey, Jack B.
Electricity: measuring and testing
Electrolyte properties
Using a conductivity determining device
324441, 324439, 324204, G01N 2702, G01N 2774
Patent
active
051573326
ABSTRACT:
An electrodeless conductivity measuring cell having three toroids. In one arrangement, the three toroids are stacked together wherein the center toroid is used for sensing and the two outer toroids are the drive toroids. Alternatively, the center toroid may be used as the drive coil and the outer toroids used as sense coils. Washer-shaped, grounded discs are placed between the outer toroids and the center toroid to provide for improved noise rejection. A method of validating the fluid conductivity measurement of such a measuring cell. The fluid conductivity is measured with a three-cell configuration, and then it is measured with a two-cell configuration. If the conductivity is observed to be the same, the cells are likely functioning normally. If fluid leaks into the cell cavity, the measurement of conductivity will change.
REFERENCES:
patent: 2435043 (1948-01-01), Lehde et al.
patent: 2987668 (1961-06-01), Gondouin
patent: 3396331 (1968-08-01), Sperry, III
patent: 4220920 (1980-09-01), Gross
patent: 4816758 (1989-03-01), Theissen et al.
Industrial Instruments Inc, Electrolyte Conductivity Equipment, copyright Dec. 1963, catalog 27.
Harvey Jack B.
The Foxboro Company
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