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The multi-wavelength liquid signature analyzer (MWLSA) is used to analyze the characteristics of liquid. It adopts two kinds of transmitter diodes with different peak wavelengths as the light sources of the system. With MWLSA not only the light intensity signal reflecting the optical characteristic of the sample liquid under different wavelengths can be obtained, but also the volume and outline information of the corresponding liquid drop are acquirable. The application of the multi-wavelength light sources makes it possible for us to get more information about the liquid sample, which
enriches the function of the liquid signature analyzer and improves its discrimination ability of different liquids so as to have more application fields.
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