Product showcase: This refractometer is for measuring the sugar content of beer and includes an automatic temperature compensation of 10 - 30 degree Celsius. More and more people are interested in controlling their home brew with brix refractometry by monitoring brix and specific gravity at any point during the process to optimize the quality and flavor to their satisfaction. Yieryi scale refractometer with ATC is designed to meet that very demand! Dual scale - Specific gravity 1.000-1.120 and brix 0-32% 1.ATC: Built-in automatic temperature compensation 2. Dual design: and precisely display the brix (0-32%) and specific gravity (1.000-1.120) at the same time, without switching units! The Dual Scale Refractometer designed for testing the sugar content and specific gravity of the liquid. 1. Measure progress of fermentation 2. Measure the amount of sugar present as well as alcohol concentration 3. When making homemade beer, wines, fruit juices and other beverages, use the dual scale beer wort and wine refractometer to test brix and specific gravity. Easy to use Simply test a drop of your brew on the prism and hold the refractometer to the light, then look through the eyepiece to get the reading, no need for cluttersome tables! Safe material Made with non-staining, non- and non-reactive aluminum material, light-weight and portable, safe and durable Operation steps 1. Open the cover with a soft cloth carefully wipe detection prism. 2. Test a few of the solution, placed on the detection prism, gently close the cover ,to avoid air , spreading the solution across the surface of the prism. 3. Align the and observe through the eyepiece, adjusting with the wheel. 4. Make a clear dividing line between blue and white marks. Scale value is the concentration of the solution of the boundary. Color: Black Material: aluminium Package Contents: 1 x Handheld Refractometer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.