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Rudolph’s DDM 2911 Density meter was designed by IDS with the same user considerations and Rudolph’s well established image as previously designed analyzers. The DDM is used by the petroleum, chemical, pharmaceutical, and beverage industries to measure density, specific gravity, refractive Index, color and optical rotation. An adjustable interactive touch screen LCD and a separate viewing window were included in the device as part of human factors studies. Chemically resistant polyurethane was specified to resist harsh reagents as well as provide a cost effective method of reproducing the distinctive design.