The ATR-BR is an automatic critical angle refractometer for measuring liquid media of various viscosities, regardless of color or transparency. The ATR-BR instrument is available in a variety of configurations for laboratory and production quality control.

The new housing allows more space for a larger LCD display and a splash-proof keyboard. Batch numbers can be entered directly and simple forms can be created and printed out.

Four special scales, one of which is a BRIX scale programmed at the factory, allow for a variety of uses in production and the laboratory. The ATR-BR software determines the mean and standard deviation of multiple samples. All functions may also be controlled via PC using the remote control program.


  • Robust refractometer
  • Stable measurements
  • May be used for a variety of applications
  • Easy to use
  • Excellent price-performance ratio

Automatic critical angle refractometer

  • Measurement of liquids of various viscosities regardless of opacity or color
  • 0.3 ml sample volume is sufficient
  • Date and time display
  • 10 user-defined programmable scales


  • Chemical industry: Solvents, organic polymers, distilled products, solutions of inorganic 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
  • Petrochemicals: Oils, fats, waxes, naphthalenes, raw oils, varnishes, paints


Main specifications

Models ATR-BR
Measuring scales Refractive Index (RI) Sucrose (°Brix)
Standard scales available
Customized scales on request
Measuring range 1,32000 – 1,54000 RI / 0 – 100 °Brix
Resolution 0,00001 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)
Reproducibility 0,00001 RI / 0,01 °Brix
Measurement mode Single sample


Ambient temperature +10 – +40 °C
Temperature measurement NTC sensor for measurement of sample temperature placed inside the prism
Temperature control sample No temperature regulation
Temperature control range No temperature regulation
Temperature resolution 0.01 °C
Temperature precision ± 0.03 °C
Temperature reproducibility ± 0.02 °C
Temperature compensation Brix +5 – +50 °C

Additional information

Prism Saphire
Light source/wavelength LED, interference filter 589 nm
Display backlit LCD, 16 x16 characters
Operation 20 key membrane including function keys
Interfaces/communication RS232 C serial bi-directional port, parallel interface (Centronics), USB optional


Standards* International Pharmacopoea, ASTM, ICUMSA and others

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