Electricity: measuring and testing – Conductor identification or location – Inaccessible
Patent
1979-09-18
1981-11-17
Krawczewicz, Stanley T.
Electricity: measuring and testing
Conductor identification or location
Inaccessible
73 611C, 73 231, 324140R, G01R 2726
Patent
active
043014011
ABSTRACT:
A dielectric constant detector, having a sample cell and a reference cell, is provided which is useful to provide an electrical signal that is proportional to the concentration of a component being passed through the dielectric constant detector. The fluid to be analyzed together with a reference fluid is provided to the sample cell while only the reference fluid is provided to the reference cell. The difference in the capacitances of the two cells is utilized to determine the concentration of a component passing through the sample cell. The sample and reference cells are adjusted in such a manner that the capacitance of each cell is substantially equal when the same fluid is in both cells so as to substantially reduce the signal-to-noise ratios for the dielectric constant detector.
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Vespalec et al, Performance of the Capacitance Detector for Liquid Chromatography, Journal of Chromatography, vol. 65, pp. 53-69, 1972. _
Benningfield, Jr., A Dielectric Constant Detector for Liquid Chromatography and Its Application, Mar. 5, 1979. _
Benningfield, Jr. L. V.
Roof Lewis B.
Krawczewicz Stanley T.
Phillips Petroleum Co.
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