General Test Equipment - Koehler Instrument Co., Inc.

Refractive Index of Petroleum ProductsTest MethodRefractive index is a fundamental physical property that is used inconjunction with other properties to characterize pure hydrocarbonsand their mixtures. It is a useful property for concentrationmeasurements, purity determinations and chemical identification.Automatic Petroleum Refractometer• Conforms to ASTM D1218, D1747 and D5006 test specifications• Electronic heating and cooling Peltier system eliminates the need for acirculating water bath• Automated and precise refractive index measurements• Rugged sapphire prism• Designed for samples ranging from clear to highly colored, dark and opaque• Clear graphical LCD display with on-screen instructions andfull menu operation• Multipoint calibration routines maximize accuracy• RS232C and centronics communication portsThe Koehler Automatic Refractometer uses precision optics and superiorimage analysis to extend the repeatability and accuracy of refractive indexmeasurements for petroleum products. Subjectivity is removed from testsresults because no manual activities such as aligning shadowlines orreading analog scales are necessary. Opaque hydrocarbons present noproblem for this unit which uses reflected light measurement technology asopposed to manual refractometers which are of the transmission type. Thedual temperature control system and flat, easy clean sample area make theinstrument ideal for viscous or sticky samples.Two models are available. Models K27550 and K27560 conform to ASTMD1218 and D1747 (maximum temperature 100ºC) and measures to the fifthdecimal place refractive index or one hundredth place in percent solids.The K27550 also has a built in data storage system with secure electronicsignature recording.The refractometer incorporates numerous innovations designed to improvethe accuracy of petroleum product testing. A 589 nanometer filter gives trueSodium D-Line refractive index readings. The large graphical LCD is easy toread and provides complete sample analysis documentation including thereading, temperature and scale name of the screen.Set-up, diagnostic and calibration routines are displayed with easy to followstep-by-step instructions. User-developed customer calibration curves may beprogrammed allowing automatic temperature correction and direct percentconcentration, percent reaction completion, etc. This unit has been usedsuccessfully throughout the petrochemical industry.Catalog No.K27550K27560K27504K27505Ordering InformationAutomatic Petroleum Refractometer for D1218 and D1747110-240V 50/60HzIncludes data storageAutomatic Petroleum Refractometer for D1218 and D1747110-240V 50/60HzAccessoriesCalibration Fluid,Certificate of NIST traceability included.Refractometer Communication Software Package,with real-time data export into Microsoft ® Excel.K27550 Automatic RefractometerSpecificationsMeasurement Scales:Refractive Index (RI)BRIX (% sucrose)Temperature Corrected RITemperature Corrected BRIXTen User-Programmable ScalesIllumination: 589nm light emitting diode with interference filter(estimated life: 100,000 hrs)Range:Dissolved Solids: 0 to 95% solidsRefractive Index: 1.29000 to 1.70000nD(nD - Sodium D-Line Refractive Index)Readability:Standard Mode: 0.1% Solids 0.0001nDExtended Mode: 0.01% Solids 0.00001nDPrecision:Standard Mode: ±0.02% Solids ± 0.00002nDExtended Display Mode: Refractive Index Standard Oils ± 0.00002Typical clear aqueous samples, % Solids Temperature Compensated,as sucrose ±0.02%Calibration Fluid: refractive index standard oil, NIST traceablenominal value 1.495 RI, 67.61 BRIXSample Types: Transparent, translucent or opaquePrism Assembly: Stainless steel, synthetic sapphire sealed withsolvent-resistant epoxyCalibration:1 point - Water only2 point - Water and refractive index or Brix standardElectrical Requirements:110-240V 50/60HzDimensions lxwxh,in.(cm)15 1 ⁄2x10x4 1 ⁄2 (39 1 ⁄2x25 1 ⁄2x11 1 ⁄2)Net Weight: 23 lbs (10 1 ⁄2kg)Shipping InformationShipping Weight: 30 lbs (14kg)Dimensions: 5 Cu. ft.73