Octagonal Magnetic Stirring Bar PTFE with Pivot Ring Feature:
Item No. MSB-PR series
Material Polytetrafluoroethylene (PTFE)
Color White
Shape Cylindrical with Pivot Ring
Size Custom
Magnetic stir bars (aka lab stirrers) are the key accessory for magnetic stirrers. Using the strange sorcery of magnetism, stir bars rotate within the host liquid to provide safe, efficient stirring. Cylindrical stirring bars with smooth surface, many uses.
Magnetic stirring bar set consists of 10 of the most standard bars, complete with crystal clear box.
The stirrer magnet is a bar magnet encapsulated in a material which protects the magnet and prevents contamination of the liquid medium.
The core of the stirrer magnet is usually Alnico V, a less used alternative is Samarium-Cobalt. Due to its exceptional chemical and thermal (-200 °C to +260 °C) properties, Polytetraflouroethylene is the most preferred encapsulant. It can easily be processed, is readily sterilised and satisfies FDA and USP Class IV requirements.
In principle, it is difficult to find the most effective magnetic stirring bar for a particular application, but important factors are the vessel shape and the viscosity of the stirring medium. In a petri dish, a long stirring bar at low speed will be effective, in a round bottom vessel egg-shaped (oval) magnetic stirrers will be a suitable choice. The ideal configuration is where the magnet of the stirring bar and the magnet of the drive are of equal length and with a minimum distance between them.
with magnetic centre and PTFE-coating
very good chemical resistance
cylindrical shape Pivot Ring Magnetic Stir Bars
with smooth surfaces
magnetic stirring bar with pivot rings automatically find the best turning position
Prod # Description Unit
MSB-PR-1 Stir Bar, Pivot Ring, PTFE, 15 x 4.5mm OD
MSB-PR-2 Stir Bar, Pivot Ring, PTFE, 12 x 4.5mm OD
MSB-PR-3 Stir Bar, Pivot Ring, PTFE, 20 x 6mm OD
MSB-PR-4 Stir Bar, Pivot Ring, PTFE, 25 x 6mm OD
MSB-PR-5 Stir Bar, Pivot Ring, PTFE, 35 x 6mm OD
MSB-PR-6 Stir Bar, Pivot Ring, PTFE, 45 x 8mm OD
MSB-PR-7 Stir Bar, Pivot Ring, PTFE, 40 x 8mm OD
MSB-PR-8 Stir Bar, Pivot Ring, PTFE, 60 x 9.5mm OD
MSB-PR-9 Stir Bar, Pivot Ring, PTFE, 50 x 8mm OD
MSB-PR-10 Stir Bar, Pivot Ring, PTFE, 70 x 9.5mm OD
MSB-PR-11 Stir Bar, Pivot Ring, PTFE, 30 x 6mm OD
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