• Robust refractometer
  • Very stable measurements
  • For versatile applications
  • Easy handling
  • Excellent price-performance ratio


ATR-ST/ATR-BR series

Compact laboratory refractometer. The new ATR-BR is an critical angle refractometer for the measuring of liquid media from low to high viscosity, and independent of opacity and color. The ATR instrument are available in a variety of configurations for laboratory and production quality control.

The newly designed casing offers more space for a bigger LCD display and a splash proofed foil keyboard. Batch numbers can be entered directly and also simple form may be created and printed out.

4 special scales, one of them being programmed as Brix scale by the factory, allow various applications in production and laboratory. The software of the ATR-BR, designed close to the practice makes it possible to take the mean value and to determine standard derivation and adjustable measuring delay for special measurement in dependence of the temperature. All functions may also be controlled via PC using the remote control program.

NEW: Serial to Ethernet converter for data transfer to PC

Features of ATR Automatic Refractometers

  • Measurement of liquids from low to high viscosity
  • Irrespective of opacity and colour
  • 0.3 ml sample volume is sufficient
  • Data and time function
  • 10 user-defined scales programmable


  • Chemical industry: Solvents, organic polymers, destilled products, solutions of anorganic compounds
  • Food industry: Yoghurt, jam, fruit extract, syrup, honey, coffee extract, vegetable fat, albumen, chocolate, milk, baby food etc.
  • Beverage: Soft drinks, fruit juice, wine, beer
  • Medical applications: Serum, blood, urine
  • Pharmaceutical/cosmetical industry: Essences, essential oils, flavors
  • Petrochemics: Oils, fats, waxes, naphtalenes, raw oils, varnishes, paints


Main specifications

Measuring scalesRefractive Index (RI) Sucrose (%Brix)
Standard scales available
Customised scales on request
Measuring range1,32000 – 1,54000 RI / 0 – 100 %Brix
Resolution0,00001 RI / 0,01 %Brix
Precision± 0,00002 RI / ± 0,01 %Brix (measurement range 1,32 – 1,44) and
± 0,00003 RI / ± 0,01 %Brix (measurement range 1,44 – 1,54)
Reproducibility0,00001 RI / 0,01 %Brix
Measurement modeSingle sample


Ambient temperature+10 – +40 °C
Temperature measurementNTC sensor for measurement of sample temperature placed inside the prism
Temperature control sampleNo temperature regulation
Temperature control rangeNo temperature regulation
Temperature resolution0.01 °C
Temperature precision± 0.03 °C
Temperature reproducibility± 0.02 °C
Temperature compensation Brix+5 – +50 °C

Additional information

Light source/wavelengthLED, interference filter 589 nm
Displayback -lit LCD, 16 x16 characters
Operation20 key membrane including function keys
Interfaces/communicationRS232 C serial bi-directional port, parallel interface (Centronics), USB optional


Standards*International Pharmacopoea, ASTM, ICUMSA and others

* Specific standard depends on application and the country it is used in. Details on request.