Wide Measurement Range: This refractometer has a scale ranging from 0-100 ppt (0-10%), allowing you to accurately measure the salinity of seawater or very low concentration salt solutions. It also features a second scale for measuring the density of salt solutions in the range of 1.000 to 1.070 g/cm3 with a resolution of 0.001 g/cm3. High Precision Readings: This refractometer has a reading resolution of 1 ppt, ensuring precise and accurate measurements. Whether you are monitoring the salinity of your marine aquarium or experimenting with salt solutions, you can rely on this instrument to provide reliable results. Quick Liquid Measurements: Measuring liquids has never been easier with this refractometer. Simply apply a few drops of liquid to the optical section of the instrument, cover the prism (liquids easily spread onto the prism), and observe the light through the eyepiece (adjust the if necessary). The scale markings on the instrument make it easy to read the measurements. Wide Range of Uses: Designed for measuring seawater and brackish water in marine fish tanks, this refractometer is an essential tool for aquarium hobbyists and professionals. It provides accurate readings to maintain optimal salinity levels in your aquarium, ensuring the healthy growth of marine life. Strong and Reliable: This refractometer is made of high-quality materials to withstand daily use, ensuring its durability and reliability. Its compact and portable design makes it easy to carry and use anywhere you need to measure salinity or density. Invest in this refractometer and experience its superior performance and longevity., Manufacturer: ZXZZAS