Gardner Colour

Colour Measurement | Colour Scales | Gardner Colour

Lovibond® 3000 Comparator Gardner AF 228 - Gardner Colour Scale (ASTM D1544)

Price: £1,135.00 (£1,333.63 Including VAT at 17.5%)

Lovibond® Gardner Comparator 3000, AF 228

Gardner Colour Scale
The Gardner Colour scale as specified in ASTM D1544 is a single number colour scale for grading light transmitting samples with colour 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.

Lovibond® Gardner Comparator 3000, AF 228
The Lovibond® Gardner Comparator 3000 is a 3-field instrument for visually determining the Gardner Colour of samples by direct comparison with coloured glass standards. It incorporates the 18 glass standards which make up the scale in a pair of discs:

Colour discs:
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 Colour scale are viewed
simultaneously, making it easier to achieve the optimum colour match. For rapid colour grading within predetermined colour limits, the glass standards can be set to the two limiting colours, making it easy to see if the sample is within tolerance. The tungsten halogen light source is colour corrected to CIE standard illuminant C, which guarantees constant lighting conditions for colour grading, day or night, whatever the ambient lighting.

Principle of Operation
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 colour standards into adjoining fields of view. The two discs containing the colour standards are rotated by turning the control knobs on the front of the comparator until the colour of the sample falls between two standards which are 1 Gardner Colour unit apart, or until it exactly matches one of the standards. The reading given directly as Gardner Colour is then taken from the scale on the control knobs.

Technical Specification
Measuring principle : Visual comparison with coloured glass standards
Mode : Transmittance
Viewing system : Prismatic with integral blue filter for light standardisation
Light source : Tungsten halogen lamp, 12 Volt, 20 Watt
Illuminant : C
Power pack : 12 Volt ac, switchable to suit 220/110 Volt supply
Approvals : CE
Instrument housing : Fabricated mild steel
Dimensions : Width 235 mm, depth 245 mm, height 90 mm
Weight : 4.9 kg

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

Lovibond® PFX195/1 Colourimeter (131951)

Price: £3,523.00 (£4,139.53 Including VAT at 17.5%)

Automatic Colorimeter for Liquid Chemicals, Industrial Oils & Derivatives

Colour Testing Made Simple
The Lovibond® PFX195 is an easy to use, automatic instrument that requires no special skills to operate. The built-in menu guides users through the selection of operating parameters such as colour scale. Thereafter, readings are made with a single key press, taking less than 25 seconds to complete.

Easily Customised to User Specifications
Adaptable software and design allow users to configure the PFX195 to their requirements. Operators can set the language for display, program the PFX195 to show only those scales of interest or restrict access to the menu system. As well as standard colorimetry cells, the PFX195 can be used with a range of tubes and standard, flow-through and disposable spectrophotometer cells.

Calculation and Description of Off-Hue Status
The PFX195 off-hue status is a useful facility that reveals whether the sample colour is characteristic of the selected scale. It includes a description of hue difference (eg. redder, greener), relative saturation (stronger or weaker) and an off-hue factor (a relative measure of the distance away in colour space of the sample colour from the ‘true’ colour scale).

Suited to Laboratory or Production Environments
Comprehensive facilities for colour management make the Lovibond® PFX195 an ideal choice for the laboratory. However, with excellent calibration stability, password protection for tamper proof control and simple operation, the PFX195 also supports the migration of quality control to the manufacturing area, making it a costeffective option for dedicated production testing. For easy maintenance, the Lovibond® PFX195 includes a robust steel sample chamber, which is simply removed and cleaned if a spillage occurs, and the precision filament lamp is easily assessed and changed from outside the instrument.

Optimised Use of Colour Data
Data sets can be saved in the instrument, printed out or automatically downloaded to a PC computer where they can be processed and stored for future analysis, traceability and monitoring trends. The colour control oftware supplied with the PFX195 enables the generation of spectral and CIE diagrams as well as analysis of spectral data. It also permits direct control of the instrument from the computer.

Confidence in Colour Measurement
For regular conformance checking each PFX195 is provided with a calibrated glass filter of known colour value. Sets of conformance filters and certified colour reference solutions are also available for routine calibration and verification of test data. Conformance filters are supplied with a Certificate of Conformity stating their colour values and confirming that they have been manufactured and inspected under the control of Tintometer’s ISO 9001: 2000 quality system. Certified colour reference solutions are supplied with full traceability to internationally recognised standards, either ISO/IEC 17025:2000 (ASTM Color, Saybolt and Gardner Colour) or the ISO 9001: 2000 quality system (Pt-Co Units).

Colour Scales
Pt-Co/Hazen/APHA Units
Gardner Colour
Iodine Colour
X Y Z tristimulus values
x y Y chromaticity co-ordinates
CIE L*a*b* colour space
DE colour difference
Transmittance (full spectrum and at specified wavelengths)
Optical density (full spectrum and at specified wavelengths)

Accessories Supplied
Windows® software
2 x 10 mm, 1 x 50 mm optical glass cells
Calibrated glass conformance filter (Pt-Co 150 units, Gardner 4, Iodine 5)
Sample bottles of certified colour reference solutions (Pt-Co 15 units, Gardner 5)
Spare lamp
Operating instructions

Lovibond® PFX950/P with Heater (139830)

Price: £6,255.00 (£7,349.63 Including VAT at 17.5%)

Core Colour Scales for Mineral Oils & Petrochemicals
The Lovibond® PFX950/P incorporates the popular scales that meet the colour analysis requirements of many oil refineries. It includes both Saybolt Colour and ASTM Color, scales that are accepted internationally for oil analysis, as well as Platinum-Cobalt Units for oil derivatives and petrochemicals. An integrated heater unit is available as a factory fitted option for maintaining samples such as waxes in a liquid state

Colour Scales
Saybolt Colour
ASTM Color
Pt-Co/Hazen/APHA Units
X Y Z tristimulus values
x y Y chromaticity co-ordinates
CIE L*a*b* colour space
DE colour difference
Transmittance (full spectrum and at specified wavelengths)

Accessories Supplied
1 x 33mm, 1 x 100mm optical* glass cells
Calibrated glass conformance filter (Saybolt +10)
Sample bottles of certified colour reference solutions (Saybolt +12, ASTM Color 3)
Spare lamp
Operating instructions
* borosilicate glass for PFX950/P + heater

Lovibond® PFX995 with heater (139960)

Price: £8,405.00 (£9,875.88 Including VAT at 17.5%)

Precision Colour Analysis made Simple
The Lovibond® PFX995 is an easy to use, automatic instrument. The menu system guides operators through the selection of operating parameters. Thereafter, measurements are initiated by a single key press and take less than 25 seconds to complete. Use of sample cells up to 6” path length ensures precise colour measurement, without multiplying errors, even with unsaturated samples.

Confidence in Instrument Performance
The PFX995 is a rugged colorimeter with a fabricated steel housing, which is designed to function equally as a QC instrument within the laboratory or on 24 hour operation in a production environment. A diagnostic test routine and status report allows users to conduct periodic checks on the instrument or identify faults. For regular conformance testing the PFX995 is also supplied with a certified glass filter of specified Lovibond® colour value.

Optimised Use of Colour Data
The accuracy, repeatability and reproducibility of data provided by the Lovibond® PFX995 allow for tighter colour specifications and greater colour consistency in oil processing. The PFX995 is supplied with a Windows® software program, allowing data sets to be automatically downloaded to a PC where they can be processed or stored. It also permits remote control of the instrument.

TECHNICAL SPECIFICATION
Measuring principle 16 interference filters
Spectral response 420 - 710 nm
Bandwidth 20 nm
Repeatability
- chromaticity (x y) ± 0.0002
- transmittance ± 0.25 %
- Lovibond® values ± 0.1
Measurement time Less than 25 seconds
Calibration Single key press; fully automated
Light source 5 Volt, 10 Watt tungsten halogen lamp (lens ended)
Illuminant CIE Illuminant A, C, D65
Observer 2°, 10°
Path length 0.004" - 6" (0.1 - 153 mm)
Interface Parallel printer port, RS 232 port
Input voltage Universal, via external power supply
Approvals CE
Display 2 x 40-character, back-lit LCD
Keypad 21-key membrane keypad; washable polyester with audible feedback
Instructions 7 languages: English, French, German, Spanish, Italian, Portuguese, Dutch
Heater unit Factory fitted option, 95°C max
Instrument housing Fabricated sheet steel with tough, textured paint finish
Dimensions Width515mm, depth195mm, height 170mm
Weight 7.75 kg

Colour Scales
Lovibond® RYBN Colour
AOCS-Tintometer® Colour
Gardner Colour
Pt-Co/Hazen/APHA Units
FAC Colour
Chlorophyll A & B
beta Carotene
Iodine Colour
Hess-Ives Colour Units
Klett Colour (blue filter KS-42),
Kreis Value
X Y Z tristimulus values
x y Y chromaticity co-ordinates
CIE L*a*b* colour space
L*C*h colour space
Hunter L a b colour space
DE colour difference
Transmittance (full spectrum and at specified wavelengths)
Optical density (full spectrum and at specified wavelengths)

Accessories Supplied
Windows® software
1 x 10mm, 1 x 100mm, 1 x 1”, 1 x 51/4” optical* glass cells
Calibrated glass conformance filter
Sample bottles of certified colour reference solutions (Lovibond® 0.4R, 1.9Y, 0.1N, Gardner 5)
Spare lamp
Operating instructions
* borosilicate glass for PFX995 + heater