Material and design: The salinity meter features an aluminum body that is lightweight and wear resistant. The rubber handle is nonslip, soft and comfortable for steady handling. Portable and compact: Handheld, small in size and easy to carry, enabling quick salinity measurements wherever you are. Easy to use: Place the sample on the main prism, close the panel, hold the refractometer up to the light, and look through the eyepiece for the reading. ATC function: Automatic temperature compensation provides accurate readings across temperature variations with precision. Performance and accuracy: More accurate than a hydrometer, delivering reliable salinity measurements with straightforward operation. Use scenarios: Maintain proper salinity in seawater aquariums and marine hobbyist setups. Field seawater sampling during outdoor research, boating, or coastal surveys. Monitor salinity of hydroponic nutrient solutions or other liquid samples in labs or agricultural settings. Compatibility and context: Designed for common liquid salinity measurements in both field and lab environments, combining portability with reliable performance.