The automatically operating digital process refractometer iPR HR² (High Resolution) measures the refractive index continuously and thus, the concentration of a binary or quasi-binary liquid mixture. They are especially developed for the checking of liquids with very low solid concentrations (e.g., Light drinks). The iPR HR² has a very high resolution and precision.

In-line process digital refractometer iPR FR² with extremely short reaction time for continuous measurement and real-time process control with an analogue data output. It is characterized by minimal size and weight and has an excellent price-performance ratio.