The rotary lab sieve sifter borrows its design from the Mary Ann sieve sifter. Like the Mary Ann, it is a totally enclosed unit, which can be used with 8" or 12" sieves. Sieve stack capacity is six full-height (3") 12" sieves with a bottom pan. Unit timing is controlled by a digital count-down controller with a large, red LED display. Operation can be set from 1 to 99 minutes. Settings can be saved between tests to speed operation and provide repeatability of tests. Dimensions: 19" x 24" x 58" (483 x 610 x 1473mm).