Definition of "sensitometer" []

• A device used for measuring the sensitivity of photographic film to light. (noun)
• A similar device for measuring the sensitivity of eyes to light. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Evaluates motion picture film to determine characteristics, such as sensitivity to light, density, and exposure time required for printing, using sensitometer, densitometer, and timer lights."
• "Another method, employed largely in England, depends on the use of the Warnerke sensitometer."
• "The plates were exposed in the sensitometer as usual, except that it was found convenient in several cases to use a larger stop, measuring 0.316 cm. in diameter."