Salinity Measurement
Refractometers can be used to measure the salt concentration of soy sauce, other sauces, juice, ketchup, miso soup, other soups, pickling liquid, seasoning liquid, liquids for preserving seafood, etc... Salinity Refractometers, such as the MASTER-S28α, MASTER-S28M, and the PAL-03S are designed for measuring salt and water. If the solution contains some other ingredients as well, such as, sugar, protein, or minerals, they will affect the measurements. Users who would like to measure only salt out of mixed solutions, the PAL-ES2, PAL-ES3, and the ES-421 are the best choice since those are designed for measuring salt only.