Vortex mixers are compact and stable. A fixed-speed vortex mixer is available which provides vortexing at 2500 rpm, a standard setting for many applications. If greater variability is required, the variable speed vortex mixer can be used, which offers variable speed from 0 to 2500 rpm. Both models have an electronic speed control to ensure the same speed is maintained at all times, even during changes of load and both feature continuous or touch operation.