A.KRÜSS Refractometer DR6000-T

Powerful all-rounder: the DR6000-T

As a standard, the refractometer models DR6000-T and DR6000-TF are equipped with a Peltier element that controls the temperature of the sample up to 80°C. There are four different models available for different requirements on accuracy, resolution and measurement range whereby you can access the same operation and functionality.

  • Measurement of turbid or highly viscous samples
  • With highly accurate internal Peltier temperature control
  • Preinstalled and freely definable scales with conversions based on tables or formulas
  • Chemical-resistant materials such as measurement prism made of sapphire, measuring tray made of stainless steel
  • Intuitive operation via touch-screen display
  • Complete data recording and backup including audit trail
  • Flexible data export
  • Compliance with global standards and norms

Typical applications

The DR6000-T models are the ideal solution for the pharmaceutical, chemical, food and beverage industries, flavors, fragrance and essential oil, petrochemical, metalworking and automotive industries, as well as hospitals, pharmacies and exam offices.

  • Characterisation tests in research and development
  • Identity test, purity control and concentration determination of raw materials, semi-finished products and end products
  • Tracking of chemical processes during production
  • Stability test
  • Determination of the sugar concentration in semi-finished products and end products
  • Determination of the solids content in solutions
  • Determination of the purity in combination with a polarimeter
  • Monitoring of the production of semi-finished products and end products
  • Routine analysis with high sample throughput
  • Determination of the sugar concentration in juices and alcohol-free beverages
  • Determination of the alcohol or extract content in beer, spices, wine or spirits
  • Sewage water check
  • Incoming and outgoing goods inspection
  • Checking medicines for pharmacopeias
  • Analysis of body secretions
  • Testing of the compliance with national and international standards

Conformity with national and international standards

A big advantage of normalized measurements is the comparability of the measurement results. Refractometers for specific measuring tasks are recommended as suitable measuring instruments in many international standards and guidelines. The requirements for the measuring devices, such as measuring accuracy and measuring temperature, are dependent on the respective measuring task and defined in each standard. We have compiled for you an overview of all known standards and guidelines, which refer to the refractometry.

  • Association of Analytical Communities (AOAC)
  • American Oil Chemists’ Society (AOCS)
  • American Society for Testing and Materials (ASTM)
  • German Institute for Standardization (DIN)
  • International Organization of Legal Metrology (OIML)
  • International Organization of Vine and Wine (OIV)
  • International Commission for Uniform Methods of Sugar Analysis (ICUMSA)
  • International Organization for Standardization (ISO)
  • United States Pharmacopeial (USP)
  • European Pharmacopoeia (Ph. Eur.)
  • European Honey Commission (EHC)

All samples are measurable

From bright to dark, from basic to acidic, from a low to a high viscosity – for our refractometers almost all samples are measurable. A high-quality optics, intelligent evaluation logarithms and a powerful LED enable the measurement of particularly challenging samples. These include z. For example, non-homogeneous samples such as fruit juices containing pulp, opaque samples such as heavy oils or emulsions that are common in cosmetics. Aggressive acids and bases can be easily measured using a chemical-resistant stainless steel measuring tray and a sapphire prism.

In order to serve the existing variety of samples and the wide range of applications, we offer a wide range of different refractometers. For the selection of the suitable refractometer, it is helpful to define the required measuring range.

In the following table we have compiled an overview of typical samples from our customers and sorted them by refractive index. Most samples were measured at standard measurement conditions (20 ° C, λ = 589 nm), deviations are indicated. The measurements given are not specifications.


Refractive index (nD)
Concentration of sucrose, glucose, fructose and invert sugar [%Brix],

Measurement Range

nD 1.3200–1.5800
0–95 %Brix

Measurement Accurary

nD ±0.0001
±0.1 %Brix


nD 0.0001
0.1 %Brix

Measurement Period

approx. 4 s

Measurement Prism


Light Source



589 nm

Temperature Control

With integrated Peltier temperature control

Temp. Control Range

10–80 °C

Accuracy of Temp. Control

±0.1 °C

Temperature Compensation

Can be activated
(ICUMSA or freely definable)

Temperature Measurement

With integrated temperature sensor Pt100

Temperature Measurement Range

10–80 °C

Temperature Measurement Accuracy

±0.1 °C

Temperature Measurement Resolution

0.1 °C

Refractometer Standards


Refrectometer Samples