A Refractometer for every demanding Laboratory application for Measuring Refractive Index. Rudolph offers the widest range of refractometers available in the market. Rudolph is a leading analytical laboratory instrument supplier. For instance, we manufacture precision quality, benchtop instrumentation. We serve the Pharmaceutical, Chemical, Petroleum, Petro-Chemical, Food, Beverage, Flavor, fragrance, and Alcohol industries. Therefore, all our instruments are designed to meet specific application requirements.. Our instruments are designed to exceed your requirements. To meet many needs, we offer a range of models and numerous configurations. We are of course always pleased to advise you as you make a purchase decision for your laboratory.