Description: Alcohol Refractometer Widely Used In Scientific Research, Food Production, Liquor Retail, Etc., This Is A Very Environmentally Friendly And Energy-Efficient Tester That Uses Only Ambient Light And Does Not Require Batteries or Power. Refractometer is designed for measurement of distilled beverages (ethanol with water) like whiskey, brandy, fruit brandy, slivovitz, vodka, gin, tequila, etc. Note: Not recommend for wine or others which contains much sugar and other ingredients. Measuring Range : 0~80% Divisions: 1% (0~60%), 2% (60~80%) Reference Temperature: 20°C ATC :10~30°C Material composition: Aluminum Metal and Rubber Weight :109g Length : 205mm