Vaisala Polaris™ process refractometer product family

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Light your way beyond tomorrow

Ignite the full potential of your process control with the pioneering optical inline process refractometer Vaisala Polaris. The robust instruments optimize manufacturing processes, enhance productivity, and save resources, energy, and time in various industries and hundreds of applications. 

Uplift your horizons and step into the bright new future of reliability with Vaisala Polaris process refractometers. 

Success measured in a flash

Vaisala Polaris process refractometer family sheds new light on what is possible in liquid measurements. The robust instrument family provides reliable and maintenance-free liquid concentration measurements.

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Vaisala Polaris process refractometers

Vaisala Polaris™ PR53AC Process Refractometer

For food, beverage, dairy, brewery, and pharma industries

Measure Brix and other concentrations inline accurately and in real time. Pipeline installation.

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Vaisala Polaris™ PR53AP Process Refractometer

For food and beverage industries, and OEMs

Measure Brix and other concentrations inline accurately and in real time. Tank, kettle, cooker, and vessel installation.

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Vaisala Polaris™ PR53GC Process Refractometer

For chemical industry

Measure concentrations of acids, alkaline solutions, alcohols, hydrocarbons, solvents and various other solutions. Pipeline installation.

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Vaisala Polaris™ PR53GP Process Refractometer

For chemical, sugar, sweetener, petrochemical industry.

Measure Brix, sugars, acids, alkaline solutions, alcohols, hydrocarbons, solvents, and various other solutions’ concentrations. Pipeline and tank installation.

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Vaisala Polaris™ PR53SD Process Refractometer

For pulp & paper industry

Measure Total Dissolved Solids and other concentrations. Installation positions to fiberline, brown stock washing, evaporation, black liquor firing, slaker, and lime operations.

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Vaisala K‑PATENTS® Digital Divert Control System DD-23

For pulp industry, recovery boiler safety 

Vaisala K-PATENTS DD-23 system includes two Polaris PR53SD process refractometers in the main black liquor line, and two indicating transmitters and a divert control unit in an integrated panel. 

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Vaisala Polaris™ PR53M Process Refractometer

For chemical and semiconductor industries

Measure hydrochloric acid (HCI), sodium hydroxide, sodium chloride, sulphuric acid, and hydrofluoric acid and other aggressive chemicals directly inline. Installation to ½ inch process line.

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Vaisala Polaris™ PR53W Process Refractometer

For chemical, metal, and mining industries

Measure sulphuric acid, hydrochloric acid (HCI), sodium hydroxide, hydrofluoric acid, and other aggressive chemicals directly inline. Installation in large production pipelines.

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Vaisala K-PATENTS® PR-33-S Process Refractometer

For semiconductor industry

Measure CMP slurries’ concentration and bulk chemicals in semiconductor manufacturing. Installation in pipelines.

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For process refractometers

Data logging, wash control, settings and measurement parameters, service updates: 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. 

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If it is a liquid, we measure it

Vaisala's process refractometer can practically measure any liquid concentration inline, real-time. 

Processes include evaporation, distillation, fermentation, blending, drying, wet-mixing, interface detection, dilution, extraction and more. Select your industry and learn more about the applications! 


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Interested to learn what Vaisala Polaris process refractometers are capable of? Book a demo from our expert. 

The pioneering optical inline process refractometer product family Vaisala Polaris
is tested and proven in the harshest environments. Choose the technology you can rely on.

Blog: Ignite the full potential of your process control and enhance product quality with the pioneering optical inline process refractometer product family Vaisala Polaris™

Harsh chemicals, sticky sugars and syrups, extreme temperatures, and corrosive acids. Industrial processes involving liquids are no place for fragile, unreliable, hard-to-maintain measurement equipment. And when you throw tight tolerances and high hygiene requirements into the mix, it’s easy to see why picking the right measurement technology is a must. In this blog we take a look at Vaisala’s latest-generation process refractometer platform, designed to optimize your processes, save resources, energy, and time, and enhance productivity and product quality. 

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Ask our expert anything about Vaisala’s process refractometers

Watch this webinar where Vaisala's Jarkko Ruonala answers the most common questions about process refractometers. 

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Vaisala and our authorized Liquid Measurements distributors offer comprehensive customer care covering the entire lifecycle of Vaisala Polaris process refractometers and Vaisala K‑PATENTS® process refractometers, and provide application support.

Services for process refractometers

Downloads and software

Access approvals and test certificates, material safety data sheets (MSDS) and software for connectivity and communications for process refractometers.

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Frequently asked questions

Read the most typical questions regarding process refractometers.

What is a process refractometer?

Vaisala’s process refractometers are used for inline liquid concentration measurements for various industries, installation positions and applications. The real-time measurement and data they produce of the process enable advanced and accurate process control supporting industrial automation.

Learn more about the principle, technology, and measurement behind a process refractometer, the refractive index.

Measuring liquid concentration

Related content


Tailored process refractometer solutions with the Vaisala Engineer to Order service

Vaisala’s Polaris™ process refractometer range for liquid concentration measurement covers a wide variety of industries and applications. But what if your process needs something a bit special? Perhaps a custom connection size or coupling, or a flow cell size that our standard offering doesn’t have. Vaisala’s Engineer to Order service is here to help.

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How refractometer prism washing in challenging applications can create a competitive advantage

A Vaisala process refractometer gives you high-quality optical measurements of your liquid processes. With the elbow flow cell design, the flow of the fluid usually keeps the prism clean – nine times out of 10, nothing extra is needed. But in some demanding applications, a prism washing system is necessary, which we’ll look at more closely in this article. 

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We’ve upgraded our services for Liquid Measurements – now offering easier online ordering and a no-worries Care agreement

Do you own a Vaisala K-PATENTS Process Refractometer PR-23, PR-33, or PR-43, or the Vaisala Polaris PR53 product?

Calibration, prism replacement, and repair services for these product platforms are now available to purchase through Vaisala’s online store, operating around the clock. Ordering online significantly speeds up our already rapid ordering process, eliminating manual steps such as completing an RMA form or awaiting order processing and associated RMA-linked order numbers.  

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Why Vaisala?

Vaisala’s products cover the widest range of industries and applications globally.

We have over 40 years of experience from different process industry applications and installation positions. Our product development is based on our expertise and knowledge.

With the launch of Vaisala Polaris process refractometer product family we offer the most modern products in the market, and with modular product platform your needs are always met.

Our authorized distributor network is near you and ready to serve.

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We offer continuous support already before and after purchase of our products, including consultation, training, and maintenance.

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