Refractometer
measures the concentration of dissolved substances in aqueous solution
using the principle of light refraction. The higher the concentration
the higher will be the refractive index.
Food applications include the measurement of sugar content in grapes
in wine, fresh fruit, processed food, sugar solutions and beverages.
Salt concentration or specific gravity can also be measured easily
using refractometer.
Marine aquarium water specific gravity is control between 1.020
to 1.026 for the optimum health of the aquatic live.
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