Salinometer

Details Salinometer Salinometer

1982-09-08

1985-04-16

Tokar, Michael J.

Electricity: measuring and testing

Electrolyte properties

Using a conductivity determining device

324441, 324450, 204242, 204244, 204406, 204411, G01N 2702

Patent

active

045118450

ABSTRACT:
The salinometer is based on a direct determination of the conductivity ratio R.sub.t =(Cx/Cs).sub.t of sample water to standard seawater in a two channel, dual-cell, continuous-flow system. Each of the channels includes a conductivity cell with four electrodes immersed in sequence in the water flow. Two of the electrodes are current electrodes and the other two electrodes are potential electrodes. The standard water and the sample water pumped into their respective channels, are maintained at a common temperature by heat exchangers and a common bath. The salinometer circuitry include a first current source for driving a controlled current into the current electrodes of the conductivity cell to maintain a constant voltage across the potential electrodes. A second current source drives a current which is a linear function of the first controlled current into the current electrodes of the conductivity cell in the reference channel. The conductivity ratio R.sub.t is then a function of the voltage detected between the voltage electrodes in the reference source.

REFERENCES:
patent: 2769140 (1956-10-01), Obenshain
patent: 3963979 (1976-06-01), Dauphinee
patent: 3993945 (1976-11-01), Warmoth et al.

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