Nova-Tech Bel-Art Magnetic Stirring Bars Selection & Use Guide - Manual (Page 3)

Micro (Flea) magnetic stirring bars are designed for stirring small
volumes in vessels such as vials, tubes and gradient makers. Available
in a variety of colors and sizes, micro (flea) stirring bars are particularly
useful for environmental testing and life science applications in
which small sample volumes need to be prepared and evaluated.
Page 384-385.
Fluted Octagonal – rare Earth magnet: The flutes of this eight-sided bar
along with a definitive tapering to conical ends provides excellent surface
area and recessed breaks in the profile to generate strong turbulence and
efficiently move fluids. Available only in Rare Earth (Samarium Cobalt),
the shape and magnet strength make these bars especially well-suited for
viscous solutions. Page 377.
Elliptical (Egg Shaped) magnetic stirring bars are particularly well suited
for round bottom flasks. Their shape mimics that of a flask and ensures
complete mixing. They also offer minimal contact when used in plastic
containers. Page 381.
Cylindrical magnetic stirring bars offer excellent centering and
smooth running characteristics. A small removable pivot ring in the
center adds to their versatility. The pivot ring minimizes the contact
area of the bar to the vessel, reduces friction and lessens marring
of plastic containers. Page 378.
STirring
372
Polygon/giant Polygon multifaceted surfaces add turbulence
relative to similar smooth size cylindrical bars. Giant Polygon bars
can be used for stirring substantial volumes in large vessels such as
drums and tanks. Available with or without a molded pivot ring, this
ring minimizes the contact area between the bar and the vessel, thus
reducing friction and chattering. Page 378-380.
Octagon magnetic stirring bars with integral pivot ring are
the most commonly used shape. Their interrupted profile provides
greater surface area and added turbulence when compared to
the smooth surface of cylindrical bars. Pivot ring aids in reducing
friction and chattering. Page 375-376.
Octagon – Spinfinity ® : The octagonal shape was also selected for
the Spinfinity ® line. Spinfinity ® magnetic stirring bars have a hard
plastic casing that gives them superior durability in granular slurries.
Quickly identify Spinfinity
® magnetic stirring bars by their bright
purple coating. See page 374.
Octagon – rare Earth magnet: The superior magnetic energy
of Rare Earth (Samarium Cobalt) magnets provides strong coupling
with drive magnets reducing frequency of spinout in viscous
solutions or high speed stirring. The bright green Teflon
® PTFE
coating makes them easy to identify in the laboratory. See page 377.
Circulus ™ magnetic stirring bars provide strong turbulence at rela-
tively low speeds, offer reduced surface contact and have excellent
centering characteristics, particularly in vessels with convex bottoms.
Page 383.