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K27500
Automatic Petroleum Refractometer
The Koehler Automatic Refractometer uses precision optics and superior image
analysis to extend the repeatability and accuracy of refractive index
measurements for petroleum products. Subjectivity is removed from tests
results because no manual activities such as aligning shadowlines or reading
analog scales are necessary. Opaque hydrocarbons present no problem for this
unit which uses reflected light measurement technology as opposed to manual
refractometers which are of the transmission type.
The refractometer incorporates numerous innovations designed to improve the
accuracy of petroleum product testing. A 2600 cell linear scanned diode array
shadowline sensor is sensitive enough to read even the most demanding
samples. A 589 nanometer filter gives true Sodium D-Line refractive index
readings. The large graphical LCD is easy to read and provides complete
sample analysis documentation including the reading, temperature and scale
name of the screen. Documentation is also output through two RS232C serial
ports for export to either a PC or a printer. Optional Refractometer
Communication Software package provides real-time output directly into
Microsoft® Excel.
Set-up, diagnostic and calibration routines are displayed with easy to follow
step-by-step instructions. User-developed customer calibration curves may be
programmed allowing automatic temperature correction and direct percent
concentration, percent reaction completion, etc. This unit has been used
successfully throughout the petrochemical industry.
Specifications
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: 1.32000 to 1.70000nD
(nD - Sodium D-Line Refractive Index)
Readability:
Standard Mode: 0.1% Solids 0.0001nD
Extended Mode: 0.01% Solids 0.00001nD
Precision:
Standard Mode: ±0.1% Solids ± 0.0001nD
Extended Display Mode: 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
Sample Temperature Control: Peltier heat (cool) exchanger surrounding prism
permits temperature control from 10 to 70°C without an external water bath
circulator
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
Dimensions lxwxh,in.(cm)
15.5x10x4.5 (39.5x25.5x11.5)
Net Weight: 23 lbs (10.5kg)
Shipping Information
Shipping Weight: 30 lbs (14kg)
Dimensions: 5 Cu. ft.
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