Source : Webster's Revised Unabridged Dictionary (1913)

Tintometer \Tint*om"e*ter\, n. [Tint + -meter.] (Physics)
   An apparatus for the determination of colors by comparison
   with arbitrary standards; a colorimeter.

Source : WordNet®

tintometer
     n : a measuring instrument used in colorimetric analysis to
         determine the quantity of a substance from the color it
         yields with specific reagents [syn: {colorimeter}]