Product Details

Davenport density measuring columns are designed to measure the density of solid materials, notably plastics, according to BS2782 Part 6 Method 620D, ASTM D1505-68, ISO 1183 and others.

The density measuring machine also offers a quick comparative test, ideal for discerning density differences between similar materials.

A linear liquid density gradient is fitted in a cylindrical glass tube and maintained at 23°C to prevent 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 market floats 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 determined by the 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.