Professional Handheld Alcohol Refractometer: 0-80% test refractometer, professional measuring instrument, used to test the alcohol concentration of wine or liquid. Widely used in scientific research, food industry, purchasing and alcohol management. Automatic Temperature Compensation: Manual alcohol refractometer with automatic temperature compensation, ATC: 10~30, 0~80% refractometer, suitable for measuring alcohol content. Sturdy and Lightweight: Rugged design, compact size and light weight. Easy to Use :Easy to use and save a lot of money, you only need 2-3 drops of solution to get accurate readings. NOTENot recommended for wine or anything rich sugar or other ingredients. Features: Portable refractometer with automatic temperature compensation, ATC: 10~30 0~80% refractometer, suitable for measuring alcohol percentage. Rugged design, compact size and light weight and portable. Easy operation and save big, just need 2-3 drops of solution, you can get accurate readings. Not recommended for wine or others that contain a lot of sugar and other ingredients. Features: Measuring range: 0-80% alcohol volume percentage Automatic Temperature Compensation (ATC): 10C~30C (50F~86F) Length: approx. 20cm/7.87" Attention: 1.It is necessary to calibrate, you can calibrate it with clean water 2. It is necessary to maintain the surrounding environment with sufficient brightness and appropriate temperature during use. There is no temperature error of 10-30. If it deviates from this temperature, there will be a certain error. 3.Because people's focal lengths are different, reverse rotation may be required when focusing Scope of delivery: 1 piece