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Home  >>  Products  >>  Color/Gloss  >>  Gardner Comparator 3000
Lovibond Gardner Comparator 3000

3-Field Model, AF 228

References: ASTM D1544, ASTM D6166, AOCS Td 1A and Ja-9, DIN / ISO 4630

For the color grading of natural and drying oils
which do not differ from the color standards in hue.

New Design
The Comparator 3000 (AF228) and Petroleum Oil Comparator (AF650) have now been replaced by one new design that combines the strengths of both previous instruments, with a number of significant advantages.

Comparator 3000




FEATURES MORE INFO PRICE LIST
 

 

Features

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  • Improved appearance and ergonomics.
  • Constructed from ABS (Acrylonitrile Butadiene Styrene) Fire Retardant Plastic. This robust, chemically resistant material is ideal for industrial environments.
  • Single press of large switch illuminates sample for one minute (two presses = two minutes, three presses = three minutes). So no energy and bulb wastage.
  • Halogen, long life, light source combined with standard daylight filters ensures full compliance with old units and consistency from unit to unit.
  • Low voltage power supply.
  • Disk values read directly from disks.
  • Disk can be simply, but securely, removed allowing replacement if necessary.
  • A new replaceable white insert is included with each instrument to ensure correct lighting levels are
    preserved. The old models white painted internals often became contaminated and discolored over time.
  • Packs of 3 white insert replacements can be ordered when needed (as with the current Model F instrument).
  • As with the PFX and PFXi ranges, fully removable sample chamber allows quick cleanup of inevitable spillages.

 

More Information

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The Gardner Color scales as specified in ASTM D1544 is a single number color scale for grading light transmitting samples with color characteristics ranging from light yellow to brownish red. It is widely used for oils, paint and chemicals, such as resins, varnishes, lacquers, drying oils, fatty acids, lecithin, sunflower oil, linseed oil, The scale is defined by the chromaticities of glass standards numbered from 1 for the lightest to 18 for the darkest.

The Lovibond® Gardner Comparator 3000 is a 3-field instrument for visually determining the Gardner Color of samples by direct comparison with colored glass standards. It incorporates the 18 glass standards which make up the scale in a pair of discs:


Disc Color Standard
4/30-1 1, 3, 5, 7, 9, 11, 13, 15, 17
4/30-2 2, 4, 6, 8, 10, 12, 14, 16, 18

With a 3-section field of view, the sample and two adjacent standards on the Gardner Color scale are viewed simultaneously, making it easier to achieve the optimum color match. For rapid color grading within predetermined color limits, the glass standards can be set to the two limiting colors, making it easy to see if the sample is within tolerance. The tungsten halogen light source is color corrected to CIE standard illuminant C, which guarantees constant lighting conditions for color grading, day or night, whatever the ambient lighting.

The sample is poured into a 10.65 mm diameter test tube and placed in the sample hole in the comparator. The sample is viewed through a prism which brings the sample and the color standards into adjoining fields of view. The two discs containing the color standards are rotated by turning the control knobs on the front of the comparator until the color of the sample falls between two standards which are 1 Gardner Color unit apart, or until it exactly matches one of the standards. The reading given directly as Gardner Color is then taken from the scale on the control knobs.

The Lovibond® Gardner Comparator 3000 is supplied with a single test tube of 10.65 mm diameter.


Color Comparator 3000

 

Prices

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Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices

2 Certified Color Discs (each with a standards from 1-18), Halogen Light Source (12V), Color corrected blue daylight filter, Sample tube
CL-345010 Lovibond®/Gardner Color Comparator, 110/220V, 60/50 Hz, AC $3,689.00
Replacements
CL-AF228/T Replacement Flat bottom tube (each) 21.00
CL-240010 4/30-1 Color Disc 596.00
CL-240020 4/30-2 Color Disc 596.00
Other scales also available: Rosin, Beer, Malt, Whiskey, and FAC.
Lovibond® and Tintometer® are the registered trade marks of The Tintometer Ltd., Amesbury, UK.



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