seade, millega valguse läbilaskvuse põhjal mõõdetkse nt bakterikasvu söötmel, luu tihedust röntgenipildilt, üksteisest eraldatud aineosade hulka katseklaasis või elektroforeesiplaadil või erinevate meetoditega värvitud rakkude arvu
microdensitometer; densitometer - In X-ray densitometry,device used for the measurement of optical density of an X-ray film.The film of the radiographed samples rests on a movable table which passes over a light source with a slit-shaped aperture(measuring slit).The light signals of varying intensity are transformed by a potentiometer into electrical impulses.These in turn activate a strip-chart recorder.A magnetic storage unit registers selected values.
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