This Salinity Refractometer is designed for measuring the concentration of salt water and saline solution. It is perfect for use in aquariums, marine surveillance, aquaculture fish shrimp crab coral, and quality control in research and clinical laboratories. The refractometer features a dual scale for measuring salinity and density. The salinity measurement range is 0-100% (0-10% salinity) with an accuracy of +/- 1%. The density measurement range is 000-070 SG with an accuracy of +/- 001 SG. With its precision measurement capabilities, the refractometer provides a sharp dividing line (blue-white) and good readability, making it easy to obtain accurate readings. The adjustable eyepiece allows for focus adjustment, ensuring clear and precise results. The chrome-plated brass body of the refractometer is resistant to chemical corrosion and wear, significantly increasing its lifespan compared to other aluminum housings. This ensures long-lasting durability and reliable performance. Using the refractometer is simple and convenient. Just place 2-3 drops of the sample on the main prism, close the plate, and look through the viewing window to read the salinity value. The refractometer is also equipped with automatic temperature compensation (ATC) and a reference temperature of 20C. Enhance your marine fishkeeping experience with this high-quality Salinity Refractometer. Order now and enjoy accurate and reliable measurements for your aquarium and marine-related activities.