Versatile and Reliable: This salinity refractometer tester is widely used for measuring salinity of water, saltwater, and other related solutions, making it an ideal tool for aquariums, marine monitoring, fish-keeping, agriculture, and saltwater pools. Its reliability, accuracy, and convenience make it a must-have for any aquatic hobbyist or professional. Wide Measurement Range and Easy-to-Read Scale: With a measurement range of 0-100‰ (0-100PPT) and a specific gravity range of 1.000-1.070, this refractometer can measure a wide range of salinity levels, making it suitable for use in various aquatic settings. The dual scale display and clear scale markings allow for easy reading and interpretation of measurements, providing accurate and consistent results every time. Easy Operation:Drip 2-3 drops of water onto the prism.Calibrate using the Mini-screwdriver to "0".Wipe the prism with the cleaning cloth.Add 2-3 drops of the sample.Wait 30 seconds for accurate readings.Align with light and adjust the focusing ring for clear scale lines. Robust and Portable: The salinity tester for saltwater aquarium is made of non-staining, non-corrosive, and non-reactive aluminum material. It is lightweight and robust , making it easy to carry around and use on-the-go. The salinity refractometer comes with a hard case, 3 dropper, screwdriver, user manual, and cleaning cloth, ensuring its protection and longevity. Salinity Measurement: The ALLmeter refractometer saltwater aquarium is an accurate and reliable tool for measuring salt content in water, making it ideal for aquariums, marine monitoring, fish farming, and saltwater pools. Equipped with automatic temperature compensation (ATC) function, it minimizes the impact of temperature on accuracy, ensuring fast and reliable results.