Conductivity cell

Details Conductivity cell Conductivity cell

1975-07-28

1977-07-12

Rolinec, Rudolph V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 30B, G01N 2742

Patent

active

040357198

ABSTRACT:
The conductivity of an electrolytic solution is determined with accuracy and sensitivity by measuring the conductance along extended paths of small cross-sectional areas between large area electrodes. Current flow is thereby measured with minimization of distortion effects created by electrolytic depositions or other form of electrode surface contamination. Further, sensitivity and reliability are enhanced by employing conductivity cell sections as variable resistance arms in a bridge excited with an extremely low voltage, low duty cycle AC signal which is filtered and synchronously demodulated to provide the desired conductivity measurement.

REFERENCES:
patent: 2774732 (1956-12-01), Blight
patent: 2834937 (1958-05-01), Raynor
patent: 2950176 (1960-08-01), Thager et al.
patent: 3242729 (1966-03-01), Keller
patent: 3936738 (1976-02-01), Maltby

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