![sensitometer sensitometer](https://www.tekportal.net/wp-content/uploads/2018/11/sensitometer.jpg)
noun Photography.
- an instrument for testing the sensitivity of various types of film, consisting of an apparatus for exposing successive parts of the film to a light of standard intensity at successively increasing lengths of exposure.
noun
- an instrument for measuring the sensitivity to light of a photographic material over a range of exposures