Optical refractometers work in ambient light with no battery or other power source necessary. They can be used in labs, on production lines, in the field or anywhere. Simply place a drop or two of a sample on the prism and read the results immediately.
Salt Refractometer 0 to 28%, 0-100ppt w/ATC - 300006,11
Sugar Refractometer 3 Ranges 0 to 80% - 300001,02,03,10