Principle and implementations of a refracto-nephelo-turbidimeter for seawater measurements

Bo Hou; Philippe Grosso; Jean-Louis M. de Bougrenet de la Tocnaye; Marc Le Menn

doi:10.1117/1.OE.52.4.044402

3 April 2013 Principle and implementations of a refracto-nephelo-turbidimeter for seawater measurements

Bo Hou, Philippe Grosso, Jean-Louis M. de Bougrenet de la Tocnaye, Marc Le Menn

Author Affiliations +

Optical Engineering, Vol. 52, Issue 4, 044402 (April 2013). https://doi.org/10.1117/1.OE.52.4.044402

Abstract

Salinity and turbidity are two important seawater properties in physical oceanography. The study of physical oceanography requires a compact high-resolution in situ salino-turbidimeter to measure these two parameters in different ocean zones. Refractometry has proved to be an effective method to measure seawater salinity with a high resolution. Previous studies have shown that the transmission and scattering of light in a turbid medium impact the light beam deviation measurements, which makes the combination of salinity and turbidity measurements with the same sample mandatory. We analyze the requirements and challenges of a refracto-turbidimeter design from their measurement principles and correlations. According to these requirements, we propose a miniature refracto-nephelo-turbidimeter with a charge-coupled device, providing a salinity measurement resolution of 2 mg⋅kg⁻¹ and a turbidity measurement resolution of 1% of the measurement range. Based on this refracto-nephelo-turbidimeter, different embodiments are discussed to meet the different requirements for different ocean zones.

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Bo Hou, Philippe Grosso, Jean-Louis M. de Bougrenet de la Tocnaye, and Marc Le Menn "Principle and implementations of a refracto-nephelo-turbidimeter for seawater measurements," Optical Engineering 52(4), 044402 (3 April 2013). https://doi.org/10.1117/1.OE.52.4.044402

Published: 3 April 2013

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