A refractometer is a must have for any serious winemaker or all-grain brewer. It is used to measure the density of a solution. 

For Wine: Measure the brix level (sugar level) in your grapes. 

For Beer Making: A refractometer allows you take instant gravities readings at any point during the boil, or even during the run off of the sparge during an all-grain brew. 

Refractometer Information: This refractometer is hand held with a metal body, flexible eye piece and rubber grip. Our unit also comes with a manual calibration knob that is secured with a lock nut. To calibrate place one drop of water on the testing platform and adjust to zero if necessary.