colorimeter

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colorimeter

[‚kəl·ə′rim·əd·ər]
(analytical chemistry)
A device for measuring concentration of a known constituent in solution by comparison with colors of a few solutions of known concentration of that constituent. Also known as chromometer.
(optics)
An instrument that measures color by determining the intensities of the three primary colors that will give that color.

colorimeter

A device that measures the red, green and blue values of color. See colorimetry and color calibration. Contrast with densitometer.