Food and Beverage

Milk Evaporation and Spray Drying



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The K-Patents Sanitary Refractometer PR-23-A is an ideal in-line refractometer for milk based products. The sensor is 3A Sanitary approved, EHEDG tested, and it withstands CIP and high temperatures. The sensor is angle mounted on the outer radius of a pipe bend directly or by using a flow cell, a Sanitary clamp or a Varivent® connection. This way the best flow conditions and self-cleaning effect can be achieved.

The K-Patents Sanitary Refractometers PR-23-A are used:

  • For standardisation (e.g. after hydration tank) to check that correct total solids of the milk are achieved.
  • After evaporation to continuously control milk concentration levels.
  • In evaporators to monitor sugar syrup addition when making sweetened condensed milk. A sugar content of at least 62.5% in the aqueous phase is required to produce an osmotic pressure high enough to inhibit the growth of bacteria.
  • To monitor feed product concentration to the spray dryer.

Although Brix is an equally effective scale for control purpose, K-Patents refractometer can also be calibrated for dry solids or total solids if these are the dairy plants’ preferred standard reference scales.


In-line Blending of Juice


Pharma Refractometers – PR23AC

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Water and juice concentrate enter the system via balance tanks. The concentrate is then fed into the water stream to form pre-blended juice. The ratio of the two streams is controlled by flow meters and a process controller. Immediately after this, final blending to a pre-set Brix value is achieved by adding a small amount of water by way of a separate line. Then, the juice is passed through a static mixer, located just prior to the K-Patents Sanitary Process Refractometer PR-23-AC.

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Food and Beverage