sensitometer meaning in Hindi

The Warnerke Standard Sensitometer consisted of a frame holding an opaque screen with an array of typically 25 numbered, gradually pigmented squares brought into contact with the photographic plate during a timed test exposure under a phosphorescent tablet excited before by the light of a burning Magnesium ribbon.
The film " lab " thus needs various apparatus from developing equipment and machines, over measuring tools, cutting, editing devices, and printers to different sorts of viewing machinery including classic sensitometers, densitometers, analysers, and array of chemical laboratory items that will help maintaining a level of repeatability of operations.
The system was later extended to cover larger ranges and some of its practical shortcomings were addressed by the Austrian scientist Josef Maria Eder ( 1855 1944 ) and Flemish-born botanist ( 1896 1960 ), ( who, in 1919 / 1920, jointly developed their " Eder Hecht neutral wedge sensitometer " measuring emulsion speeds in " Eder Hecht " grades ).

noun.

a measuring instrument for measuring the light sensitivity of film over a range of exposures