Instantly read the gravity, in Brix, of unfermented wort of fruit juice – with just a few drops of liquid. This refractometer reads gravity by measuring the angle at which the light passes through the sample. Easier to use than a hydrometer, you only need a few drops for the sample.
NOTE: Post fermentation (FG) cannot be directly read with a refractometer, due to the presence of alcohol. There are online refractometer adjustment calculators you can use, but many people choose to use a hydrometer for Final Gravity readings.