1.Handheld refractometer, used to measure the Brix specific gravity of your Wort in solution, the Brix scale range is 0-32%, and the specific gravity scale range is 1.000-1.130 2.Easy to use, place 2-3 drops of sample on the main prism, close the plate and look through the eyepiece for brix reading 3.Versatile refractometer with automatic temperature compensation (10~30), calibration screw (Calibrate to "0") ensures accurate measurement and focus adjustment ensures clear reading 4.Portable Refractometer, sturdy design, compact in size and light in weight, lined with plastic case, convenient to keep and carry 5.It is widely used in beer industry to track the process of fermentation, &amp; commonly used by home brewers Product Description Specific Brix/Gravity Refractometer The specific gravity scale will provide a quick reading of your original gravity. Once fermentation has started and alcohol is present, keep track of the Brix scale and use the refractometer calculator for final gravity correction. *Icing on the cake, it only requires a few drops of liquid for an accurate reading. No need to waste an entire hydrometer in the process. Features: Tuneability - Item Weight: 9g. Length: 170mm. Package Weight: ATC (Automatic Temperature Compensation System) Compensation Range 10-30C. Instructions: 1. Open the daylight plate and place 2-3 drops of sample on the main prism. 2. Lightly press the daylight plate to get a parting line. 3. Look inside and read the appropriate scale to divide the line. 4. Rotate clockwise or counterclockwise until the reticle scale is clearly visible. 5. Scale inside the reticle. Scale / characteristics: Glucose/sugar. Scale range: 0~32% Bx< /p> Resolution: 0.2% Bx Must specific gravity Scale range: 1,000 ~ 1,130. Resolution: 0.001. Calibrate at 0000. Use distilled water to calibrate at 0000 because the Brix content of distilled water is 0%. Ensures accurate measurement and focus adjustment ensures clear reading. Open the box. Avoid damage to the product inside, the plastic case can be a bit difficult to open. Using a tool, press the switch and pull gently. Attention: This Brix refractometer includes a specific gravity scale. You won't have to convert between brix and gravity when measuring the original gravity of worts or millet. Measuring the final gravity accurately will require some calculations as the presence of alcohol affects the reading. Do not immerse the device in water. Do not use solvent to clean plastic lenses. Crystallized honey must be melted before detection. High temperature honey should be cooled below 40 . It will burn and affect normal use.