VP 772FN-5-5A - PTFE Sandwich Disc Style Stirrer 5.1 mm Diameter 2.3 mm Thick, Powered by 2 NdFeB Stir Discs, Heat Resistant to 80C, for Conventional, Tumble & Lateral Stirrers, for 96 well Microplates and vials

The VP 772F series is a new concept in magnetic stirrers. The VP 772F features pairs of parylene encapsulated NdFeB or SmCo magnetic discs with a 1.58 mm thick pocketed sheet of PTFE sandwiched in between (Patent Pending). An N in the part number indicates that the discs are NdFeB An S in the part number indicates that the discs are SmCo An A at the end of the part number indicates that the magnets in the discs have opposite polarity for conventional and horizontal stirrers. No letter at the end of the part number indicates that the magnets in the discs have matching polarity for vortex and tumble stirrers. The PTFE sheet can be made to any shape to accommodate the internal dimensions of any vessel as illustrated in the photo to the right. Multiple pockets to accommodate multiple magnetic discs are also possible as indicated in the photo. All these stirrers were designed to be small enough (width) to fit through the neck of the bottle and long enough to cover the internal diameter of the bottle for maximum surface contact. When placed on a VP 708 Vortex Lateral Tumble Stirrer the flat shape of the VP 772F stands up on edge and becomes a "paddle" capable of moving large volumes of liquid with ease. These stir elements can also be used with conventional horizontal magnetic stirrers.