1. This High concentration Brix Refactometer is a Versatile refractometer, with a brix scale of 0-90%, perfect for sugar measurement, contribute much for the management of product quality, delivery inspection, sweetness classification and so on. 2. It is widely used in the manufacture or production of sugar, food, fruit, beverages etc. 3. Equipped with built-in atc range compensation (automatic temperature compensation) from 10 to 30 to correct temperature discrepancies during use. 4. Easy to use, sturdy design, compact in size and light in weight, convenient to keep up and carry arround. 5. With Built-in ATC (Automatic Temperature Compensation) from 10-30 degree Celsius.Cushioned with soft & comfortable non-slip rubber. With a higher measuring range (Brix 0-90%), this refractometer can be used to measure from low to high sugar objects, such as honey, strong sugar water etc. 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. Colour:Black Material:aluminum Package Contents: 1 * 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.