Noncontact Optical Fiber Sensor for Measuring the Refractive Index of Liquids

<div>Measurements with different thicknesses of glycerin samples showed an error &lt; 10<sup>−3</sup>. Straight lines (horizontal) represent the reported value of glycerin.</div>

Journal of Sensors

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Figure 5

Figure 5: Noncontact Optical Fiber Sensor for Measuring the Refractive Index of Liquids 