Density Gradient Columns
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Catalog excerpts

Density Gradient Columns - 1

The Davenport two column density measuringapparatus is designed to measure the density of solid materials, notably plastics, by the technique described in BS2782 Part 6: Method 620D, ASTM D1505-68, ISO 1183 and others. It is also a quick comparative test, ideal for discerning differences between similar materials.A linear liquid density gradient is fitted in acylindrical glass tube and maintained at 23 > C toprevent the gradient being disturbed by thermal convection.Temperature control circuits work in conjunction with electric heaters and a simple cooling coil to maintain accuracy. The density gradient obtained is determined by introducing a set (usually nine) of accurately calibrated marketfloats whose densities cover the desired range of the column at equal density intervals. The floats provide not only the calibration reference values of the gradient, but also act as a check on the stability of the density gradient. Samples placed in the column will sink until they reach liquid of their own density.The relative position of specimens is detemined bythe graduations on the side of the column. Back illumination of the columns improves visibility of the precise sample position. The Davenport apparatus is equipped so that column tubes are filled in situ as simply as possible. > ?Measures density of small samples of solid materials?Simple set-up, operation and maintenance?Complies with international standards?Accuracy to 0.0001 g/ml?Constant temperature control via heating and cooling circuits?Accepts mains water?Column solution filling apparatus supplied forease of use > Graduated Columns:2 mm interval markingsAccuracy:Accurate to 0.0001 g/ml Cathetometer:No Column Illumination:Yes Column Sweep:Standard One Float per Column:Sets of 9, calibrated and certificated. Standard ranges falling between the overall range 0.8-1.5999 g/ml. Others 0to special order.Filling Mechanism:StandardTemperature Control:Constant 23аC0.1ѰCWater Capacity (distilled):20 litres Water Supply (cooling):Mains water, preferably recirculated Standards:BS2782 Part 6: Method 620D, ASTM D1505-68, ISO 1183Minimum Height Clearance:2160 mm (85 in) Net Weight:24 kg (53 lb) Specification SheetSpecification Sheet July 2005SS-RH-7403-0705 2005, by AMETEK, Inc. size="-3">

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