photoelectric densitometer

photoelectric densitometer

[¦fōd·ō·i′lek·trik ‚den·sə′täm·əd·ər]
(engineering)
An electronic instrument used to measure the density or opacity of a film or other material; a beam of light is directed through the material, and the amount of light transmitted is measured with a photocell and meter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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