Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1975-05-29
1976-06-22
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
039654141
ABSTRACT:
D
A system for determining the resistance of an electrolyte into which a conductivity probe is immersed, the system including a thermistor network, a probe or conductivity cell, and amplifiers all of which are so combined that the changes in electrolyte concentrations causing variations in resistance are measured with corrections being made for electrolyte temperature variation. The probe and thermistor networks control the feedback of the amplifier, and the probe and thermistor networks being arranged to adjust the output whereby the signal is in true proportion to conductivity.
REFERENCES:
patent: 3493857 (1970-02-01), Silverman
patent: 3781911 (1973-12-01), Davidson
Rolinec R. V.
Tokar Michael J.
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