SALINOMETER

摘要

TITLE SALINOMETER INVENTORS Thomas M. Dauphinee Christopher G.M. Kirby The salinometer is based on a direct determination of the conductivity ratio Rt = (Cx/Cs)t of simple 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 Rt is then a function of the voltage detected between the voltage electrodes in the reference source.