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Gardner (ASTM D1544, D6166) Colour Reference Standards are for routine calibration of colour measuring instruments and verification of test data. These colour standards are dual UKAS certified to the International Standards BS EN ISO / IEC 17025 and ISO 17034.

These standards are especially designed for use in DIN, Ford, ISO, Shell and Zahn flow cups. Certified at 20°C and 25°C, each value is tested to ASTM D2162 for viscosity measurement and ASTM D1480 for Density measurement, certified to the International Standards BS EN ISO / IEC 17025 and ISO 17034.

These standards ensure full compliance to ASTM & IP test method protocol and are fully traceable to national standards. They are dual UKAS certified to the International Standards BS EN ISO / IEC 17025 and ISO 17034.

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- BS/IP/MSL Viscometer for Transparent Liquids
- BS/U-tube Viscometer for Transparent Liquids
- BS/U/M Miniature Viscometer for Transparent Liquids
- Cannon-Fenske Routine Viscometer for Transparent Liquids
- Cannon-Fenske Opaque Viscometer for Transparent and Opaque Liquids
- Houillon ISL® Viscometer for Transparent and Opaque Liquids
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- D2500 Cloud Point
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- D6371 Cold Filter Plugging Point
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- D943 Oxidation
- D97 Pour Point
- Glass Capillary Viscometers
- BS/IP/RF U-Tube Reverse Flow for Transparent and Opaque Liquids
- BS/IP/SL Viscometer for Transparent Liquids
- BS/IP/SL(S) Suspended Level Short Form for Transparent Liquids
- BS/IP/MSL Viscometer for Transparent Liquids
- BS/U-tube Viscometer for Transparent Liquids
- BS/U/M Miniature Viscometer for Transparent Liquids
- Cannon-Fenske Routine Viscometer for Transparent Liquids
- Cannon-Fenske Opaque Viscometer for Transparent and Opaque Liquids
- Houillon ISL® Viscometer for Transparent and Opaque Liquids
- Ubbelohde Viscometer for Tranparent Liquids
- Zeitfuchs Cross-Arm Viscometer for Transparent and Opaque Liquids
- Viscometers & Viscometer Bath Media
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