Specification of Koehler K27580 Automatic Petroleum Refractometer w/ Touch Screen
Test Method
Refractive Index is a fundamental physical property that is used in conjunction with other properties to characterize pure hydrocarbons and their mixtures. It is a useful property for concentration measurements, purity determinations and chemical identification.
Specifications
Conforms to the Specifications of:
ASTM D1218, D1747, D5006, D5775
Measurement Scales: Refractive Index (RI), BRIX (% sucrose), Temperature Corrected RI, Temperature Corrected BRIX, Ten User-Programmable Scales
Illumination: 589nm light emitting diode with interference filter (estimated life: 100,000 hrs)
Range: Dissolved Solids: 0 to 95% solids
Refractive Index: 1.26000 to 1.72000nD (nD - Sodium D-Line Refractive Index)
Readability: 0.01% Solids 0.00001nD
Precision: Refractive Index Standard Oils ± 0.00002 - Typical clear aqueous samples, % Solids Temperature Compensated, as sucrose ±0.02%
Calibration Fluid: refractive index standard oil, NIST traceable nominal value 1.495 RI, 67.61 BRIX
Sample Types: Transparent, translucent or opaque
Prism Assembly: Stainless steel, synthetic sapphire sealed with solvent-resistant epoxy
Calibration: 1 point - Water only; 2 point - Water and refractive index or Brix standard