noun
A scientific instrument for measuring the concentration of sugar in a solution, typically using optical rotation.
サッカリメーターを使って果汁の糖度を測定した。
We measured the sugar content of the fruit juice using a saccharimeter.
糖度計 is a more general Japanese term for a sugar content meter, while サッカリメーター specifically refers to an optical saccharimeter.
Loanword from English 'saccharimeter', derived from 'saccharo-' (sugar) and '-meter' (measuring device).