These multiposition stirrers have four user-friendly operating modes that allow the selection of specific rows and columns, individual stirring of each position, or simultaneous stirring of all positions. Units are easy to read with digital VFD control monitors and LED operating lamps. The advanced microprocessor PID controls accurately control stirring speed. Top plates are stainless steel for excellent chemical resistance. Brushless DC motors are quiet and durable. Gradual start-up, built in thermal shutdown, and current limit protection device provide user safety.