Digital Rotator - variable speed, digital timer and tachometer, 100v-240vDigital Rotator variable speed, digital timer and tachometer, 100v 240v The Serology Rotator is designed to give years of dependable service, even in the busiest laboratory. Its the ideal space saving instrument for procedures that require constant or timed rotation (mixing) such as RPR, VDRL, latex tests and for procedures that require a nonstandard speed. *Includes humidity cover. Specifications Manual