In Process Refractometer

Vaisala In Process Refractometer

Refractometers measure the change in refractive index of the fluid as light passes through. This is because the velocity of light in a medium depends on its density. This measurement can be correlated to density, total dissolved solids, percentage solids, brix, Plato, Baume, or Oechsle. Vaisala refractometers can be used to measure the concentration of sugar, salt, sulphuric acid, hydrochloric acid, sodium hydroxide. It is also used in crystallization, solvent extraction, textile sizing, polymerization to understand the process efficiency.

Sanitary Process Refractometer

This meter measures Brix and other liquid concentrations so that you can know where the process in for food, beverage, dairy, and brewery manufacturing. Its sanitary construction meets 3 A standards as well as EHEDG regulations. and can be cleaned with CIP as well as COP product. The connections are available in all types of sanitary attachments.


The product works in every process condition from stable to demanding, in high process temperatures, and in sticky processes. Connectivity options include mA, HART, and Modbus RTU as a standard. The optics are positioned in the module away from the high temperature inner most regions. No calibration is necessary, and a separate attachment allows you to make calibration curves.

In Tank Probe Process Refractometer

Measure concentrations of sugars/Brix, acids, alkaline solutions, alcohols, hydrocarbons, solvents, and various other solutions directly in pipelines and tanks, in production transport and perform quality control in sugar, chemical, petrochemical, and other industries.


The Vaisala Polaris PR53GP probe process refractometer is the concentration measurement solution of choice for sugar, chemical, petrochemical, and other industries. Optional cooling cover is available for processes where extreme temperature is common. 



Typical applications include crystallizers, wet scrubbers, reactors, transport pipelines, and blending and distillation

Indigo transmitters for Vaisala refractometers

Data logging, wash control, trends, settings and measurement parameters


Vaisala Polaris combined with Indigo520 offers compelling features for all users and are a standard power couple for applications and installation positions with prism wash system.


Access data and different features through the Indigo520, including data logging, wash control, settings, measurement parameters and Indigo service updates to Indigo520. 



The Indigo520 for process refractometers offers versatile system connectivity by two selected analog or digital inputs for process refractometers and other Indigo compatible probes, and four configurable analog outputs to alarm relays, and ModBus TCP/IP digital protocol.

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