感かん光こう計けい

noun

sensitometer

Photography term: a device for measuring the sensitivity of photographic materials to light.

• 感かん光こう計けいを使つかってフィルムの感かん度どを測そく定ていする。

  Measure the film sensitivity using a sensitometer.

noun

actinometer

Physics term: a device for measuring the intensity of radiation, especially ultraviolet light.

• 紫し外がい線せんの強つよさを感かん光こう計けいで測はかる。

  Measure the intensity of ultraviolet rays with an actinometer.