The DPA-4 is the only ASTM D86 compliant analyzer available. It is the most widespread distillation process analyzer on the market. Refinery operator's requirements have had a significant influence on the redesign process of the new DPA-4 model with the result of the faster Rapid Analysis Method (RAM) beside the Standard Analysis Method (SAM) which is still compliant to the ASTM D86 laboratory method.
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