The unique and innovative Vaisala K-PATENTS Sanitary Refractometer PR-43-A system consists of a compact or probe refractometer and a graphical user interface. The refractometer is a stand-alone device capable of operating independently. It has a measurement range of 0 to 100 Brix and provides an Ethernet or 4–20 mA output signal proportional to the temperature-compensated Brix value for real-time process control. 

• Sanitary compact refractometer PR-43-AC model for installation in pipeline sizes of 2.5 inch and smaller. The refractometer is installed in the pipe bend. It is angle mounted in the outer corner of the pipe bend directly or through a flow cell with a Sanitary clamp or a Varivent® connection.
• Sanitary probe refractometer PR-43-AP for installation in large pipes, tanks, cookers, crystallizers and kettles and for higher temperatures up to 150°C (300 °F). The refractometer is installed in the pipe line or vessel through a 2.5 inch or 4 inch Sanitary clamp.
• Sanitary flush mounted refractometer PR-23-APT for hygienic installations in cookers, cooling crystallizers and other vessels that have scrapers or mixers The refractometer is installed through an APV tank bottom flange. It can also be installed through a steam jacket.

Different user interface options range from a rugged, multichannel, industrial computer to a compact lightweight and a web-based version, and allow the user to select the most preferred way to access and use the refractometer measurement and diagnostics data. The user interface of the refractometer can be installed locally in the field, remotely in the control room or in both locations by connecting several user interfaces in a network.