High quality and accurate testing results are guaranteed Equipped with Built-in ATC compensation Range (Automatic Temperature Compensation) from 10 degree to 30 degree to correct temperature discrepancies during use Easy to focus & calibrate and very convenient to use and built to last long This Alcohol refractometer is designed for the measurement of distilled beverages (ethanol with water) like for whiskey, , fruit , slivovitz, vodka, , tequila, Chinese alcohol, etc. Removing alcohol concentration test refractometer 0-80% alcohol liquor concentration meter, rice wine concentration test and used in the detection of liquor alcohol content, alcohol refractometer series (liquor) is specifically detect the concentration of ethanol in solution the most intuitive instrument, can rapid determination of alcohol (ethanol) percentage concentration. This model works for alcohol testing (to test the alcohol concentration in the alcohol solution, not the grape wines or the other fruit wines). Its unit is W/W (Weight/Weight), the refractometers working temperature is suggested at 20 Celsius (about 18 Celsius to 25 Celsius). Measure the alcohol content accurately in seconds! All you need to do is manufacture a distillate of the liquids to be measured, and then place the distilled sample on the prism. Measuring Range : V/V 0-80% Minimum Divisions : V/V 1% Accuracy : 1% Colour:black Material:plastic Size:159 x 28mm Package Contents: 1 * Refractometer 1 * Pipette 1 * Cleaning cloth 1 * Carrying bag Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.