The Autotap and Dual Autotap tapped density analyzers for powders are simple-to-use, automated devices which comply with a large number of internationally recognized standard methods. They provide a high level of test method control with a user-selectable, lockable number of taps. Tapping rate and drop height are fixed to provide consistent results from sample to sample. A large range of sample sizes can be accommodated with the use of a number of different graduated cylinder sizes.