The CBX032 analog refractometer provides accurate and repeatable measurements on an easy to read scale. This instrument is great for the testing the amount of sugars and dissolved solids in Fruits, Vegetables and Grasses. Also used in wine and Beer making to get just the right concentration of sugars. This refractometer also has a built-in automatic temperature Compensation system from 0 to 30 degrees C so your brix readings wont be skewed by temperature. Gives accurate readings with as little as 2 drops of solution to make monitoring the sugar levels of your crops, plants and trees a breeze. A valuable tool to help determine if it"s the right time for harvest or you need to alter your plant food. Take this item with you to your local farmer"s market and buy the best quality produce available.Easily adjust the lens and prism with a simple focus and hold up to the light to see where the line of refraction crosses the scale.