Fisher Scientific
Fisherbrand™ Digital Vortex Mixer
02-215-418
This vortexer mixes the samples very well and is not very expensive. You can program the time and speed. I recommend the equipment because you can program mixing your samples and they can be at room temperature or in a cold area. The vortexer is easy to assemble, approximately 10 min maximum, and it's ready to use.
Vortex