The unit measures the refraction of light generated between the prism surface and a liquid sample. The PRM-100α is upgraded from the PRM-85 in the following aspects: • Wider than ever 0.0 to 100.00% Brix range • Improved measurement accuracy: Brix ±0.05%, nD ±0.00010 • Two options for setting the minimum indication decimal place • Simple two-piece construction: detection section and operation display section • Easy-to-read color display panel. Simply attach the unit to a piping system to monitor food or beverage production, pharmaceutical production, industrial fluid, washing devices, dilution/mixing devices, etc. Continuously monitor water content and mixing ratio with successive measurements of refractive index, Brix, or concentration. *The prism is specially designed to prevent solid materials from collecting on the surface, even after extended periods of use.