Automatic Temperature Compensation (ATC): Our refractometer features a builtin ATC function that ensures accurate measurements in the 10–30 C range. This eliminates worries about temperature fluctuations and guarantees precise results. Easy to Use and Calibrate: The device is designed for simplicity and quick calibration. The soft padding on the handle provides a comfortable non slip grip, enabling effortless testing. Adjustable Key Points and Clear Scale: The refractometer offers an adjustable Key Points feature for clear, sharp readings. The large measurement values are easy to read, ensuring accuracy and convenience. Certified Quality and Safety Standards: It has undergone rigorous quality and safety certifications, guaranteeing reliability and durability. It is suitable for measuring saltwater or the concentration of salt in water and supports diverse applications, including clinical laboratories, food and beverage quality control, and marine aquarium management. Use scenarios: Marine aquarium management: monitor salinity to maintain stable conditions for fish and corals. Clinical laboratories and food and beverage quality control: verify salt concentrations in solutions and products. Field testing and educational use: quick salinity checks in home, school, or hobby settings.