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High-resolution and compact refractometer for salinity measurements

机译:高分辨率和紧凑型折光仪,用于盐度测量

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摘要

A new compact optical refractometer is presented to improve the measurement of the refractive index of seawater. These measurements are useful in oceanography to calculate density and salinity of oceans from empirical relations. This refractometer shows a lower temperature dependence and obtains a better absolute accuracy on salinity compared to the conductivity sensors which are used nowadays to assess seawater salinity. Tests and calibrations have been made in a temperature-stabilized seawater tank. They show that the prototype is capable of measuring seawater refractive index with a resolution of about +-4 X 10~(-7), equivalent to a salinity resolution of +-2 X 10~(-3) g kg~(-1).
机译:提出了一种新型的紧凑型光学折光仪,以改善海水折射率的测量。这些测量在海洋学中可用于根据经验关系来计算海洋的密度和盐度。与目前用于评估海水盐度的电导率传感器相比,该折光仪显示出较低的温度依赖性,并获得更好的盐度绝对精度。已在温度稳定的海水罐中进行了测试和校准。他们表明该原型能够测量海水折射率,分辨率约为+ -4 X 10〜(-7),相当于盐度分辨率为+ -2 X 10〜(-3)g kg〜(-1) )。

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