These Corning® stirrers with the glass-ceramic Pyroceram® top have digital stirring speed displays. Exclusive closed-loop stirring control monitors and regulates the stirring speed from 60-1150 RPM for aqueous, viscous, or semi-solid solutions. Digital LED speed display gives you better control of your stirring process. Stronger, larger magnet improves stir bar coupling combined with automatic ramp up speed adjustment minimizes decoupling. Two piece casting design deflects spills away from electronics and includes a built in mount for an optional 18" (45.7cm) support rod (Cat. No. 440129).