Brix/Specific Gravity Refractometer  * The Specific Gravity scale will provide a quick reading of your Original Gravity. Once fermentation has begun and alcohol is present, keep track of the Brix scale and use the Refractometer Calculator for Final Gravity correction. * Best of all, it only requires a few drops of liquid for an accurate reading. No need to lose a whole hydrometer test jar of beer or wine in the process. Specification: Focus possibility Item Weight: 3.36 ounces Length: 170mm Shipping Weight: 8.14 ounces ATC Compensation Range (Built-in Automatic Temperature Compensation System) from 10~30°C How to Use 1.Open the daylight plate and place 2~3 drops of sample on the main prism. 2.Press the daylight plate lightly to get a dividing line. 3.Looking inside and read the relevant scale for dividing line. 4.Twist clockwise or counter-clockwise until reticle scale can be see clearly. 5.Reticle scale inside the refractometer. Scale / Characteristic Glucose/sugar Scale Range: 0~32% Bx Resolution: 0.2% Bx Wort Specific Gravity Scale Range: 1.000~1.130 Resolution: 0.001 Calibrate to "0" Use the distilled water to calibrate to "0",since the distilled water's brix Content is 0%. Ensures accurate measurement and focus adjustment assures clear reading. Matters Needing Attention: This brix refractometer includes a specific gravity scale. You won't have to do conversions between brix and gravity when measuring the Original Gravity of musts or wort. Measuring final gravity accurately will still take some calculations, as the presence of alcohol does affect the reading. Don't submerge the unit in water. Don't use solvent to clean plastic lens. Crystallized honey must be melted before detection. High temperature honey must be cooled to below 40 ℃ to detect, otherwise it will burn the prism, and affecting the normal use. Packing Included 1*Refractometer 1*Mini-screwdriver 1*Pipette 1*Wiping cloth 1*English Instruction manual 1*Plastic Case