For stiff mixing challenges, Labman have designed and developed a heavy duty vortexer. The vortexer is capable of sample weights up to 10kg. The mixing profile including speed, direction and acceleration can be set to allow optimisation for particular materials. The unique aspect of this vortexer is that the radius can be modified manually. A variable radius is required if a variety of different sample containers are to be used. Labman have manufactured this vortexer for stand-alone manual use or for integration into a larger automated system.