Refraction is the change in the velocity of a light wave that hits a surface as it passes from one medium to another with a different refractive index. The refractive index is the ratio between the speed of light in vacuum and the speed of light in another substance, is a physical property characteristic of each species (solid, liquid or gaseous) that is characterized by the propagation of light in a given medium. This parameter of analysis is a good approximation for media where losses by absorption or other phenomena are negligible.

The measuring instrument associated with this parameter is called a refractometer. Its operation is based on measuring the amount of curvature of light passing through the sample. The formula behind the phenomenon is Snell's law, which is often used to describe the relationship between angles of incidence and light.

Types of Refractometers a Lab May Need

ATC Car Refractometers YR05916 // YR05930

ATC models are equipped with °C unit system. With the indication of the percentage we may know the freezing point...


ATC Milk Refractometers YR05937 – YR05938

The Kalstein ATC Refractometer is a handheld, portable, milk refractometer with a milk scale that measures in the 0.0 to 20% range...


ATC Wine Refractometers YR05931 // YR05936

The Wine Refractometer is a metal device that provides you with fast & accurate results. It’s dual-scale provides you the direct...


Beer Refractometers YR05939 // YR05943 

The Kalstein hand-held optical refractometer measures the density of sugars in the solution and gives you an instant gravity...


Our best-selling Refractometer

  • Automatic Temperature Compensation (ATC): between 10 and 40°C (50 – 104°C)
  • Measurement Time: Approximately 1.5 seconds
  • Minimum Sample Volume: 2 metric drops
  • Light Source: Yellow LED
  • Sample Cell: Stainless steel ring and flint glass prism
  • Case Materia: l ABS
  • Enclosure Rating: IP65
  • Battery:1.5v AAA
  • Auto-Off: After 3 minutes of non-use
  • Dimensions: 58*25*121mm

Analysis of the best Refractometers for your Laboratory

What is the

Refraction is the change in the velocity of a light wave that hits a surface as it passes from one medium to another with a...



Refraction can be defined as the change of radiation direction when passing from one material to another, this phenomenon...


How do I read the Refractometer?

The Refractometer is an optical Laboratory instrument designed to measure sugar, alcohol or salt content in Brix, depending...


How is Food Analyzed with the Refractometer?

The Refractometer is an instrument that is used in Laboratories to obtain sugar levels, sodium chloride, degrees Brix expressed...


Guides for you to become an expert in Refractometers

Refractometers are essential products in a Laboratory, we provide guides and recommendations for better use, so you can work as an expert.

What is a Laboratory Refractometer?
- Kalstein

Refractometers are optical instruments used to determine the percentage of soluble solids in a liquid solution. For this, the refractometer...

What are the advantages of using the Refractometer?

The Refractometer is a Laboratory instrument used to measure the total solids in a solution and determine their state of purity...

Refractometers and the wine industry
- Kalstein

Refractometers are optical devices that are used to determine the percentage of soluble solids in a liquid solution, making use of the...

Use of the Refractometer

Refraction is the change in the speed of light as it passes from one medium to another, which is manifested by the variation that occurs in the wave as it passes through the media (gaseous, liquid, solid). Light travels in different materials at different speeds, making the refractive index a specific physical property. The formula behind the phenomenon is described with the Snell Law, which is used to describe the relationship between the angles of incidence and light.

Frequently asked questions about Refractometers

To know the price of the Refractometers we invite you to send us an email with your request through the contact form

The delivery time of your

Kalstein product will depend on the following: 

  1. If the equipment of your interest is in stock or if on the contrary it should be manufactured. 
  2. The type of freight you have chosen may be; air or sea.
  • Equipment in stock:  

– Delivery Time (Aereo): 15-30 days.  

– Delivery Time (Maritimo): 45-60 days. 

  • Equipment not in stock:  

– Delivery Time (Aereo): 30-60 days.  

– Delivery Time (Maritimo): 60-90 days. 

You can make your purchase through: 

  1. By email: 
  2. By phone: +33 (0) 1 78 95 87 02
  3. Electronic commerce: Through Kalstein's official website in his country. 

All Kalstein equipment has a 1-year warranty against manufacturing defects. The warranty does not cover damage caused by a poor installation or operation by the user, transportation defects or uses other than those specified by the manufacturer. Warranty excludes electrical or consumable parts. For more information visit our "terms and conditions" by clicking HERE

At Kalstein we provide our customers with inductions and technical support through new online methods. You can visit our inductions, technical assistance and guidance videos provided by a Kalstein team through our YouTube channel (Kalstein English). HERE

Of course, you can request a quote for the Kalstein team of interest, directly from our official website. Once you have identified the model of your choice, click HERE

Send us a direct message and one of our agents will contact you


    Company headquarters

    5 rue de Castiglione 75001 Paris – France.
    (+33) 01 70 39 26 50(+33) 7 60 83 92 83


    We are always close.


    Follow our activity on social networks

    Stay informed with all current news of the sector.

    Personalized and instant quotes

    Generate quotes based on selected product information.