Specification Measuring Range: 0-20% Brix Minimum Division: 0.20% Brix Accuracy: ±0.15% ATC Compensation Range: 10°C~30°C (50°F~86°F) Manual calibration with mini-screw driver provided Length: 200mm Weight: 165g Equipped with high measurements capabilities Durable and built to last long heavy-duty and lightweight with its aluminum construction Easy to focus and calibrate Accurate testing results guaranteed Made with the highest and finest quality of aluminum & rubber that makes it lightweight Cushioned with soft & comfortable non-slip rubber Extremely easy-to-use Feature This is also specially for the cutting fluids testing and for low brix solution testing. , 0.20 brix divisions ,accuracy of ±0.15% and ATC of 10°C~30°C or 50°F~86°F. Specially designed for people involved with food harvesting, processing and packaging. To measure or test the concentration or refractive index of liquids and work with sugar-related liquids such fruits and vegetables juices and sugar in food and beverages to ensure product quality, Reamsian Bodily Fluids (per the Reams Biological Theory of Ionization), and Maple Sap or for synthetic or semi-synthetic coolants (for machining and grinding coolants, please consult the Technical Data Sheet for appropriate concentration of fluid), monitor the specific percentage of sugar concentration in food and beverages, and can easily check the ripeness of fruits in the field. And because it uses ambient light only, no batteries or power source is necessary to view the chart clearly. Accessories included: 1 Pipette Mini Screw Driver***Foam Cushioned Plastic Carrying Case***Operations Manual (User's Manual)