GEMPRO REFRACTOMETER $575.00  Our GEMPRO Refractometer has several outstanding features: New Hemicylinder Glass - This new colorless hemicylinder glass not only maintains a high refractive index, but also provides several benefits over other standard refractometer hemicylinders: greater hardness (6+) for scratch reduction less dispersion for sharper RI readings high chemical resistance for less tarnishing and etching Monochromatic Light Source - The provided white light source fits into the back of the Refractometer unit and is readily changed to monochromatic viewing by sliding the provided sodium filter into the slot in the back of the unit. Coated Multi-element Glass Lens - Provides Optimal correction for clearer RI readings and for greater ease in viewing the entire scale range. The GemPro Refractometer comes complete with cover, light soure, glass polarizing lens, sodium filter and contact liquid. ASK US ABOUT UPGRADING YOUR REFRACTOMETER.