Cylindrical Magnetic Stirring Bars PTFE withnot Pivot Ring Feature:
Item No. MSB-PR series
Material Polytetrafluoroethylene (PTFE)
Color White
Shape Cylindrical with not Pivot Ring
Size Custom
These stirbars have polygon multifaceted surfaces that add turbulence relative to similar smooth size cylindrical bars.
Alnico magnet encapsulated in FDA Grade, USP Class VI Teflon PTFE low friction coating; durable and inert
Manufactured in a registered ISO 9001:2008 facility, as verified by SGS certification.
NEW Cylindrical Stir Bars
Produced from PTFE
For the stirring of liquids on magnetic stirrers and/or hotplate stirrers
Strong alloy magnets sheathed in pure white inert PTFE
Supplied in polarity aligned packs to ensure maximum coupling strength
Resistant to virtually all chemical attack and temperatures up to 260°C
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.
Prod # Description Unit
MSB-PR-21 Stir Bar, Cylindrical, PTFE, 6mm x 3mm OD
MSB-PR-22 Stir Bar, Cylindrical, PTFE, 8mm x 3mm OD
MSB-PR-23 Stir Bar, Cylindrical, PTFE, 12mm x 4.5mm OD White PTFE Coated Magnetic Stirring Bars with Pivot Ring
MSB-PR-24 Stir Bar, Cylindrical, PTFE, 15mm x 4.5mm OD
MSB-PR-25 Stir Bar, Cylindrical, PTFE, 20mm x 6mm OD
MSB-PR-26 Stir Bar, Cylindrical, PTFE, 25mm x 6mm OD
MSB-PR-27 Stir Bar, Cylindrical, PTFE, 30mm x 6mm OD
MSB-PR-28 Stir Bar, Cylindrical, PTFE, 35mm x 6mm OD
MSB-PR-29 Stir Bar, Cylindrical, PTFE, 40mm x 8mm OD
MSB-PR-30 Stir Bar, Cylindrical, PTFE, 45mm x 8mm OD
MSB-PR-31 Stir Bar, Cylindrical, PTFE, 50mm x 8mm OD
MSB-PR-32 Stir Bar, Cylindrical, PTFE, 60mm x 9mm OD
MSB-PR-33 Stir Bar, Cylindrical, PTFE, 70mm x 9.5mm OD
MSB-PR-34 Stir Bar, Cylindrical, PTFE, 80mm x 9.5mm OD
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