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Vaisala is a global leader in weather, environmental, and industrial measurements headquartered in Vantaa, Finland. Building on over 80 years of experience, Vaisala strives towards its mission of Observations for a better world. 

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Vaisala’s process refractometers (formerly K-Patents) continuously monitor liquid concentration to ensure manufacturing quality, increase equipment uptime, and maintain accurate Brix, liquid density or concentration by weight measurements.


With a wide range of applications in various industries, such as food and beverage, pulp and paper, semiconductors, and chemicals, Visala process refractometers use refractive index to analyze concentrations without being affected by temperature, bubbles or solid particles.

Featured Products




Designed specifically for highly regulated food and beverage industry, the Vaisala Sanitary Refractometer is the best way to measure liquid concentration in dairy, liquid food and beverage manufacturing applications.




​Vaisala PR-23-W/M Process Refractometers leverage a Saunders and Teflon for accuracy, repeatability and reliability even in the most extreme environments that can be corrosive or abrasive.



​Vaisala Pharma Refractometers are specially offer reliable, continuous in-line concentration measurements for a wide range of applications, such as Active Pharmaceutical Ingredients (API), vitamins, herbal-based medicine, vaccines and more.

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