»2mag - Magnetic stirrers, reactionblocks and magnetic drive systems. Our magnetic drives are working on the inductive principle. This means that instead of conventionally problematic motors with pull magnets, 2mag is working with stationary coils, which are defined flown through by alternating currents. The thereby generated electromagnetic rotating field is 100% wear- and maintenance-free.«

Link: http://www.2mag.de/index_e.html