The Collaborative International Dictionary of English v.0.48:

Saccharimeter \Sac`cha*rim"e*ter\, n. [L. saccharon sugar +
   -meter: cf. F. saccharim[`e]tre.]
   An instrument for ascertaining the quantity of saccharine
   matter in any solution, as the juice of a plant, or brewers'
   and distillers' worts. [Written also saccharometer.]
   [1913 Webster]

   Note: The common saccharimeter of the brewer is an hydrometer
         adapted by its scale to point out the proportion of
         saccharine matter in a solution of any specific
         gravity. The polarizing saccharimeter of the chemist is
         a complex optical apparatus, in which polarized light
         is transmitted through the saccharine solution, and the
         proportion of sugar indicated by the relative deviation
         of the plane of polarization.
         [1913 Webster]