INDUCTIVE CONDUCTIVITY CELL FOR WATER SALINITY MONITORING

A. Lopes Ribeiro, Helena M. Geirinhas Ramos, Pedro M. Ramos, J.M. Dias Pereira

Abstract

In this paper we describe an inductive sensor constructed as a double transformer, to be utilized to measure the water salinity in the sea and estuaries. The sensor uses two toroidal cores. Each core is provided with one single winding. The windings have equal number of turns. The electromotive forces developed in the water give rise to electrical currents which act as the secondary currents of one transformer and the primary currents of the other. Therefore, the relation between the voltage applied to the primary circuit and the voltage in the secondary depend on the conductivity of the water.

Keywords

inductive conductivity sensor, water conductivity, electrolytic conductivity, salinity

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PWC-2006-TC19-002u.pdf

DOI

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IMEKO TC

TC19 - Environmental Measurements

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