Tap Density Test Apparatus - Model: TDCal10 is perfect for determining the tapped density of powders, granules, pellets, flakes, and other materials. Friction-free bearings guarantee that the cylinder drops freely from the desired height. The tapped density, compressibility index, and Hausner ratio are computed and shown at the end of the test. Tap Density Test Apparatus - Model: TDCal10 provides a measure of powder cohesiveness, which is related to flowability. Because of its simplicity and speed of measurement, tapped density is a preferred metric for powder characterization.