The PR21-series is a range of refractrometers that have been enhanced for direct insertion into pipes and boilers. They measure the the refractive index with high precision and they allow sophisticated process monitoring in the industry of textile, food, metalworking, beverages, sugar, petrochemical and more. The color or the turbidity does not affect the measurements.
The units are suitable for waste-water control and a number of other quality inspections. They feature easy and quick installation because of their standardized flanges. They can be linked to a PLC by analog interface or PROFIBUS.