100% brand new and high qualityThis refractometer is specially made for brewing beer, but can also be great for:Fruits, vegetables and grasses: monitoring and controlling sugar concentrations in foods, beverages, crops and plants, checking » ripeness » of fruit in the field and checking product quality after harvest and/or controlling concentrations during processing and packaging to ensure the quality of wine or beer: Use brix readings to obtain wort sugars and help determine ready-made alcohol readings (for alcohol reading, best used in conjunction with a hydrometer)Metalworking fluids: helps to maintain CNC coolant and water-soluble drawing and stamping compounds, and commonly used to control the concentration of various industrial fluids such as cutting lubricants and jet flushing compounds, the need to consult temperature correction charts is eliminated with a built-in ATC of 10-30°C. The device is also equipped with a manual calibration knob, which is secured by a lock nut and has a brighter display than narrow-range refractometers. Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee that the style is the same as shown in the pictures, but not the same effect on different bodies as on the model. Thank you! -Please allow 1-3mm error due to manual measurement. -Make sure you don't mind before you bid.