Scientific Equipment Source
4-555 Wentworth Street East
Oshawa, ON, L1H 3V8
Tel: 905-231-0930
Fax: 905-231-0944


ATR-W2, automatic microprocessor controlled critical angle refractometer


Automatic critical-angle refractometer This SCHMIDT+HAENSCH automatic microprocessor controlled critical angle refractometer is designed to measure refractive index of liquid media independent of opacity, viscosity and colour. It consists of separate electronic and measuring devices. A sample volume of 0.3 ml is sufficient for measuring. The sample is simply and easily placed by dropper or pouring onto the Peltier-thermostable sapphire prism. The prism is illuminated by long life yellow LED and the angle of total reflection is detected by diode array which guarantees high resolution and stability. The ATR-W2 enables to complete measurements in a quick and simple way by using splash proofed touch-in panel with four definable keys, - START ALPHA PRINT MENU and a large illuminated 2 lines, 20 characters graphic LCD. The % Brix is temperature corrected within +15 to +40C.


  • Measurement of liquid media irrespective of viscosity, opacity and colour
  • Electronic and measuring devices separate
  • Peltier-thermostatisation
  • Working temperature between + 10C and + 70C
  • Display of temperature, refractive index and % Brix,


  • 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, aromas.
  • Petrochemics: Oils, fats, waxes, naphtalenes, raw oils, varnishes,paints.

Technical data

  • Measuring ranges: RI 1.3320 - 1.7000, Brix 0 - 95 %
  • Resolution: RI 0.00002, Brix 0.02 %
  • Precision: RI 0.00004, Brix 0.04 %
  • Display: LCD, 2 lines, 20 characters
  • Prism: Sapphire, Peltier-thermostable
  • Light source: Yellow LED
  • Detector: CCD-line with high resolution
  • Data output: RS 232 C interface
  • Parallel interface (Centronics)
  • Mains connection: 90 - 130V / 190 - 230V, 48 - 62 Hz
  • Dimensions: Electronic device: 225x360x150mm
  • Measuring device: 210x210x120mm
  • Weight: 8 kg (complete unit)

If you are a bargain hunter please give us a call, we always have instruments in stock, which have not been refurbished and can be sold as is in working condition.

Scientific Equipment Source provides service and training on site in most of central Ontario this includes neighboring cities Ajax, Whitby, Pickering, Oshawa, Toronto, Mississauga. We can also provide training and courses on site on chromatograph (GC), HPLC in the Durham region; this includes Pickering, Ajax, Whitby, Oshawa. For other customers we can be also flexible on arrangements. For the rest of customer any equipment for repair has to be sent back by a courier.