Multi-position digital magnetic hotplate stirrers are designed for synchronous heating and stirring, suitable for continuous operation. Large top plates with position indicators are easy to clean and provide a reflective surface, and can accommodate a number of stirring vessels simultaneously. Wear-free magnetic coils provide noiseless and consistent stirring at all positions. Low-profile designs allow these instruments to take up less space in the laboratory, and they easily fit into fume hoods. Screening can be performed under reproducible conditions.