Refractometers were invented by Dr. Ernst Abbe, German scientist / Austrian at the beginning of the 20th century. The Abbe refractometer is the "grandfather" of all modern refractometers, thanks to its simple functioning and reliability, still has room in the laboratories.

Refractometers are optical instruments that serve to determine the percentage of soluble solids in a liquid dissolution. For this, the refractometer makes use of the principle of total refraction of light (originated by the type and concentration of dissolved substances in a liquid solution, for example, sugar), which takes place in the boundary layer between the prism and the shows.

The refractive index of the prism determines the upper limit of the measuring range, since it must always be greater than that of the sample. The refractometer is therefore the density of the liquids, the more dense is a greater liquid it will be refraction.



Select the refractometer of your convenience.

YR01768-1 Refractometer 0-10% Brix

This model is applied to measure Brix of low concentration solution, such as: fruit juice, grape wine and most types of drinks. Measurement range: 0-10% Minimum scale: 0.1%


YR01770 Refractometer 0-32% Brix

This model is applied to measure Brix of common concentration solution. Measurement range: 0-32% minimum scale: 0.2%


YR01773 58-92% Brix Refractometer

This model is specially applied to measure three common indices of honey: sugar content, degree of baume and water content.

Refractometer YR01774 0-50% Brix

This model is designed and applied to measure the concentrated solution of grape sugar. Measurement range: 0- 50% Minimum scale: 0.5

What is the operation of refractometer based on?

The functioning of refractometers are based on refraction of light, this phenomenon when light passes from one medium to another is easy to observe. The study of refraction is very beneficial, from the analysis of the properties of light to the areas of mineralogy, for chemistry, among others. This mirror compound that directs light to a metallic frame with two prisms. The light is observed by an objective that is next to a graduated scale that allows to establish its relative position with respect to prisms. The metal tube is covered by a rubber tube so that when you take the refractometer, the temperature is not altered, since this issue influences the values โ€‹โ€‹of the liquid refractive indices. In the centerpiece there is a flap that can be opened to allow separating the two premiums and placed between them the substance that is intended to analyze. Refractometers are optical measuring devices and therefore have special maintenance.


What important considerations should I have in mind?

  • Keep both the lid and the prism, dirt can negatively influence precision in refractometer measurement.
  • Avoid scratches over the prism, since these can also have a negative influence on the measurement. Avoid blows or falls that could damage the optical system.
  • In cleaning use only a damp cloth and avoid aggressive cleaners, perfectly dry the appliance after cleaning. Keep the appliance in a dry place.
  • Clean the refractometer simply with a damp cloth and never underwater, as it could penetrate the appliance.

Our best-selling refractometer ๐Ÿ†

The refractometer is an optical precision instrument that works according to the principle: as the concentration or density of a solution increases, its refractive rate changes proportionally. The refractive angle measured by the refractometer is recorded on the scale. The greater the concentration of solute in the solution, the greater the reading on the scale.

โœ“ YR01774 0-50% Brix
This model is designed and applied to measure the concentrated solution of grape sugar. Measuring range: 0-50% Minimum scale: 0.5


What is your ideal refractometer?

There are innumerable models, so it is normal that you do not know which refractometer to buy to meet your needs. In Kalstein, we evaluate them to find what you are looking for.
Kalstein puts at your disposal high quality refractometers and a great precision.

They will help you determine with great accuracy the density of your solutions. That is why we invite you to take a look at our available refractometers.

How to correctly calibrate a refractometer.

This video covers the use of a hand held refractometer which can be used to measure salinity in liquids such as seawater. Calibration and basic information on care are also covered.

Clean and carefully dry the lid and prism also before calibration. Put 1 or 2 drops of distilled water in the prism. If the light / dark limit is not at 0% (water line), adjust it with the help of the calibration screw under the rubber coverage, help with the screwdriver that comes in the box.

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