Abbe Refractometers measure the refractive index (nD) of transparent, translucent liquids and solid substances. It is also used to measure percentage of solids (brix) of sugar solutions as well as temperature compensated brix values. * Measurement of refractive index of transparent, translucent liquids and solid substances. * Measurement of percentage of solids in sugar solution (brix). * Automatic temperature correction of brix. * RS-232 Interface. * Backlite LCD. * Prism made of hard glass * Software for computer interface (Optional)