Features of ATR-C Automatic Refractometers
  • Economic model for standard applications
  • Robust and modern enclosure for rough environments
  • Quality and quantity control of liquids
  • Highly accurate and reproducible measuring results in no time at all
  • Basic model without the possibility for sample heating or cooling
  • Internal Peltier-thermostat (option)
  • Easy to clean and easy to handle sample chamber
  • Continuous measurement
  • Start-up, configuration, calibration via external PC
  • Easy to calibrate with sucrose solutions or certified Chemical Reference Materials (CRM)
  • Documentation according to GLP/GMP, 21 CFR part 11 ready, software optionally available
  • Energy saving LED light source
  • Remote diagnostics and maintenance of data

Compact laboratory refractometer. The new ATR-C is an critical angle refractometer for the measuring of liquid media from low to high viscosity, and independent of opacity and color. The ATR-C is an economy model designed to work directly in conjuction with a PC or with an optional local readount. The instrument includes all the important features for a laboratory refractometer - index Brix and temperature scales, automatic temperature compensation and conformance with international standards of ASTM, ICUMSA and international Pharmacopoea.

Refractometry and Concentration
Refractometers are widely used to measure the amount of dissolved substances in solutions containing mainly sucrose. The relationship between refractive index and the amount of dry substance content is well known for sucrose and is the basis of the Brix scale which is measure of the number of grams of sucrose present per 100 grams of aqueous sugar solution. (50 Brix means 50 grams of solid per 100 gm of solution) This relationship holds for a large number of similar substances and so the Brix scale is widely used in the food industry. Unfortunately the refractive index of a sugar solution changes with temperature while its solid content remains the same. ( The same refractive index at different temperatures correspond to different Brix values.) Manual "Abbe" Refractometers do not compensate for this temperature effect and manual correction tables should be used to adjust the readings to a standard temperature.

TheSchmidt and Haensch range of automatic Refractometers supplied by Topac measure both the refractive index and the temperature of the sample in order to evaluate the Brix value. They read out both the actual refractive index and the actual sample temperature, but they automatically correct the Brix value to what it would be at 20 degs C. regardless of the actual sample temperature. ( In the range 10 - 40 C)
The instruments come in a variety of configurations to meet the needs of laboratory , QC, research and production applications.

Applications of Refractometers include:

Chemicals Solvents, organic polymers, distilled products, solutions of inorganic compounds, pesticides, washing agents
Agriculture Ripeness of fruits, vegetables, beet and sugar cane.
Food Industry Yogurt, jam, fruit extract, syrup, honey coffee extract, vegetable albumen, chocolate, milk, baby food.
Beverage Industry Soft drinks, fruit juice, wine, beer,
Medical Serum, blood, urine
Pharmaceutical Essences, essential oils, aromas.
Petrochemicals Oils, fats, waxes, naphthalenes, raw oils, varnishes, paints

Specifications for ATR automatic Refractometers

Measuring range: 1.3200-1.5800 nD / 0-100Brix
Resolution: 0.0001nD / 0.05 Brix
Precision: ± 0,0001 RI / ± 0,05 % Brix
Reproducibility 0,0001 RI / 0,05 %Brix
Resoluiton temperature display: 0.01°C
Working temperature: +10 to +40°C
Temperature compensation Brix: in range of +5 to +50°C
Temperature control range (optiona Peltier control) +20 - +25 °C*
Light source: 589 nm LED
Data output: 1xRS232, 1xUSB (B)
Display: Via PC andl 2 line local display.
Controls: Via PC virtual interface
Weight: 4kg

Ordering Information

Model Description Price USD
ATR-C110 Standard instrument 0,0001 nD , 0,05% Brix Peltier sample temp correction, 2 line display call for quote
ATR-C100 Basic economy Instrument as above but without the Peltier sample temperature control
Sugar Instrumentation