Model: RETK-74This Beer Refractometer is true Brix or wort specific gravity refractometer. Measure the refractive index of sample & displays result in brix & wort specific gravity, with a range from 0-32% and 1.000-1.130 respectively. It’s an optical device that, like a hydrometer, measures the specific gravity of beer or wort (brewing) or ferment for brandy. With this refractometer, you can: Measure the degree of hop sugar Measure the proportion of beer juice Measure before fermentation & after fermentation, it is possible to calculate the alcohol content of beer Measure sugar content in juices of fruits Just place a few drops of sample/liquid on the testing prism, cover, look through the eyepiece & read the result! COMMON FEATURES OF OUR REFRACTOMETERS: Auto Temperature Compensation (ATC), increases accuracy & eliminates concerns about temperature Easy to calibrate and use Cushioned w/ soft & comfortable non-slip rubberized grip, insulate the test solution from body heat Adjustable focus and clearly defined scale, w/ large easy-to-read measurements Approved by strict quality & safety standards Comes with Portable USB LED Light Specifications: Measuring Range: 0-32% Brix ; 1.000 – 1.130 Wort Specific Gravity Division: 0.2% Brix ; 0.001 Wort Specific Gravity Accuracy: ±0.2% Brix; ±0.001 Wort Specific Gravity Reference Temperature: 20°C ATC: 10-30°C Length : 17.2 cm Item Weight: 100g Set Includes: 1 x Traditional Beer Refractometer 1 x English Instruction manual 1 x Mini screwdriver 1 x Cleaning Cloth 2 x Pipettes 1 x Portable USB LED Light (Power Bank not included in set) 1 x Protective Carrying Case