Liquid conductivity measuring device

Details Liquid conductivity measuring device Liquid conductivity measuring device

1974-08-16

1976-11-16

Rolinec, R. V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 30B, G01N 2742

Patent

active

039926621

ABSTRACT:
A portable device for measuring the conductivity of a liquid between two probes spaced relative to each other along the lateral axis of a container. The gains of a plurality of operational amplifiers are varied for range, by conductivity and by temperature variations to provide a signal representative of the conductivity of the liquid. An oscillator using two operational amplifiers is used to drive the measuring amplifier.

REFERENCES:
patent: 3047797 (1962-07-01), Borsboom
patent: 3170111 (1965-02-01), Case
patent: 3393360 (1968-07-01), Keating
patent: 3493857 (1970-02-01), Silverman
patent: 3657640 (1972-04-01), Jelinek
patent: 3701006 (1972-10-01), Volkel
patent: 3784803 (1974-01-01), Brendle

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