Portable, Benchtop & Process Models

Refractive index is an important parameter used in determining the quality, quantity, purity or mixing ratio of a chemical substance. It is a common measurement used by a variety of industries – chemical, food & beverage, cosmetic, flavors and fragrances, pharmaceutical, metal working, petrochemical, education/research and environmental. Krüss manufactures a wide variety of  models to suit your needs from digital to manual hand-held units.


A.KRÜSS Optronic DR6000 Series Digital Refractometers

DR6200-TF VR mit TF-Messzelle und PTFE-Schläuchen

Available Models:

  • Basic Models DR6000, DR6100, DR6200 and DR6300
    • Large measuring range of 1.333000 nD to 1.70000 nD; 0 to 95% Brix
    • No temperature Control; Temperature compensation (ICUMSA or user-defined)
  • T-Models DR6000-T, DR6100-T, DR6200-T and DR6300-T
    • Built-in Peltier Thermostat with temperature range of 10 to 80°C
    • Large measuring range of 1.333000 nD to 1.70000 nD; 0 to 95% Brix
  • F-Models with flow cell
    • All parts that come in contact with the sample are made of PTFE
    • Can run in automated mode with peristaltic pump or AS80 autosampler
    • Uses a micro-measuring cell – Ideal for small volumes
    • Flow cell is easy to remove so sample can be placed directly on the prism if desired
  • TF-Models – a combination of both T- and F-models

Key Features

  • Large measuring range of 1.333000 nD to 1.70000 nD; 0 to 95% Brix
  • Resolution up to 0.00001 nD; 0.01% Brix
  • Intuitive, User-friendly Interface with touchscreen operation
  • Robust, low maintenance and quiet
  • Stores up to 99 user-defined methods and the last 999 measurement values
  • Export data in XLS- or CSV-format via USB flash drive or print data
  • Easy to connect to a PC or network via Ethernet Interface. Remote maintenance via internet connection
  • Optional User management with three levels of authorization
  • Meets GMP/GLP , USP, OIML and other international guidelines


A.KRÜSS Optronic Digital Hand-Held Refractometers

A.KRÜSS Optronic Digital hand-held refractometers are ideal for mobile use and have a large measurement range. Use them to inspect incoming goods, optimize quality assurance and reduce work processes. They are lightweight and easily fit in a lab coat pocket. There are three models to choose from:



DR301-95 VO

  • The most advanced digital hand-held model with many features and functions found in the standard laboratory model.
  • Large measuring range and high precision
  • Choose from refractive index scale, sugar scale, salt scale plus the ability for programming 2 User-defined scales
  • Use the 9 volt battery option for mobility or the optional power supply to convert it into a small laboratory unit
  • Easy to calibrate with water
  • Temperature compensation from 5 to 40 degrees C
  • Robust casing, light weight and easy to clean

DR201-95 and DR201-95-OE


DR201-95 VO

  • Compact digital hand-held refractometer which eliminates errors caused by misreading a manual refractometer
  • Wide measuring range on the refractive index scale (1.3330 to 1.5318 nD) and the sugar scale (0 to 95% Brix)
  • Available with the Oechsle scale instead of the sugar scale for wine growers
  • Easy to calibrate with water
  • Rugged case and low maintenance
  • Temperature compensation from 10 to 40 degrees C
  • 1.5 V battery lasts for over 1000 measurements

DR101-60 and DR101-60-OE


  • Good entry-level model with measurement range of 1.3330 to 1.4419 nD, 0 TO 60% Brix or 0 to 150° Oechsle
  • Low cost and low maintenance
  • Waterproof case allows the unit to be rinsed under running water
  • Temperature compensation from 10 to 40 degrees C
  • Easy to calibrate with water


A.KRÜSS Optronic Manual Hand-Held Refractometers







HR900 und HR901

HR-Serie VR

  • Over 20 models to choose from for a wide variety of applications
  • Easy to use and very rugged
  • Models are available with %Brix scale, density scale (nD), oechsle scale, Klosterneuberg scale, Baume scale, salinity, % alcohol, % water content in honey, g/dl, UG, antifreeze and battery acid.
  • Some models are available automatic temperature compensation
  • Easy to calibrate


A.KRÜSS Optronic AR/ Abbe Refractometers

Abbe refractometers measure the refractive index based on the principle of the total reflection that occurs at the boundary between a prism and a sample. Abbe refractometers are an excellent instrument to measure the refractive index of a solid sample. Two models are available:

AR2008 Digital Abbe Refractometer

AR2008 VR

  • Digital LCD display of refractive index or Brix value together with the temperature
  • Automatic temperature compensation feature
  • Measurement range of 1.3000 to 1.7200 nD; 0 to 95% Brix
  • Designed for harsh environments
  • Thermostat connections for both illumination prism and measurement prism
  • Serial RS-232 and RS-422 interfaces

AR4 Analog Abbe Refractometer


  • Read results via ocular; scale division of 0.0005 nD; 0.25% Brix
  • LED illumination for prism with long LED service life. 589 nm standard with other available wavelengths on request
  • Thermostat connections available
  • Supplied with digital thermometer

A.KRÜSS Optronic Products