Stir Starter - Stir Plate
This unit has two powerful NdFeB button magnets in the 12 VDC stir motor, which is controlled by a precision voltage regulator for easy speed adjustment. The RPMs of the drive motor are limited, so the motor will not "throw" the stir bar, yet it provides enough to get a good vortex going. A low voltage, plug-in wall transformer provides power to the unit. The black plastic case dimensions are 6" x 4" x 2", large enough to accomodate a 2000 mL flask as shown. A Teflon coated 1" x 5/16" stir bar is included. A "keeper" magnet is also supplied to lock the stir bar in place while the yeast is pitched, so the stir bar won't end up in your fermenter!
This is the stir plate that we have been using in the store to make our starters for classes. They are bulletproof, work, and are much more affordable than many out there. We use ours to stir 5000mL starters here as well. Did we mention they have a lifetime warranty??