Refractometer

Used for testing grapes in the field (comes with a handled cover) to determine if they are ready to be picked. This model is appropriate for use with juice and covers a sugar range of 0 to 32% sucrose in 0.2% graduations. This temperature compensated model will give accurate readings at any temperature.

It also be used in brewing, it only takes a couple drops to get a reading. Readings are usually in Brix, but with some simple math, it can be converted to SG easily. To convert this brix reading to specific gravity, simply multiply by 4.

Example: If your reading is 10 brix and you multiply by 4, you get 40. This means your wort is 1.040.