Organic Impurities AF-347

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Simple, Straightforward Test Procedure
There’s no need for you to prepare a standard solution. This kit gives dependable measurements that are easily interpreted.

Fast, Economical & Portable Visual Matching
The Comparator 2000+ is a flexible, modular system for Visual Colour Grading. Using a suitable comparator instrument and glass disc, you can quickly visually match the sample directly against the calibrated, colour stable glass standards.

Two-Field Vision for Accurate Results
Lovibond® comparator instruments include an integrated prism which causes the sample and comparison fields to overlap, allowing enhanced colour discrimination and matching. The prism is ultrasonically sealed to prevent contamination of the optics. Each individually graded glass standard represents a discrete step on the measurement range (as opposed to a continuous graduation), aiding colour discrimination and allowing great accuracy of results.

Ability to Guarantee Constant Lighting Conditions
An optional item for the Comparator 2000+ is the Daylight 2000 Lighting Unit. This is a standardised light source which guarantees you a constant lighting condition for accurate colour grading. This is particularly useful when the sample is very pale in colour. By using a Lovibond® lighting unit, you can confident of uniform lighting conditions for colour matching, 24 hours a day and irrespective of ambient lighting.

Extended Shelf Life
The unique feature of Lovibond® test discs is that they incorporate coloured glass standards that are colour stable and not affected by UV light or extreme environmental conditions.

Technical specifications
Applicable Standard ASTM C40
Color Type Transparent
Portability Portable
Title Scale Path Length Scale Range Scale Resolution Applicable Standard
Organic Impurities in fine aggregates 40 - 60 mm 1 - 5 (5 - 16) Organic plate numbers 1, 2, 3, 4, 5; Gardner 1933 5, 8, 11, 14, 16 ASTM C40