Features: This handheld refractometer accurately measure 0-32% ranging with ATC technology, serving double applications in food (juice) and industrial (coolant concentration) testing. Features imported optical prism for clear separation and metal calibration knob to maintain precise, solve drift issue common in standard refractometers. Perfect for food industry technicians monitoring sauce manufacturing engineers adjusting cutting fluid ratios with reliable concentration data. Performs flawlessly in sun exposedly orchards for fruit maturity check or temperature fluctuating workshops for coolant mixture verification. Ergonomic silicone grip and complete accessory (calibration tool, carry case) ensure hassle less operations during mobile inspections. Specifications: Component:ABS Size:Approx.200x38x38mm/7.87x1.49x1.49inch Weight: 120g. Measurement ranging: 0-32% (%). Automatic temperature compensation (compensation) ranging: 10°C ~ 30°C (50°F ~ 86°F). Reference temperature: 20°C. Package Includes: 1 Set Handheld Refractometer note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.