PTFE coated magnetic stirring bars, Teflon-Coated Magnetic Stir Bar, Magnetic Stirrer Stir Bar – PTFE Teflon Coated, Magnetic Stirring Bar, PTFE coated, Round, No Pivot Ring

PTFE coated magnetic stirring bars with a raised ring in the middle to aid stirring stability and reduce noise.

The 8 pieces set includes the following sizes:
– Size: B6: Diameter: 3mm / length: 6mm
– Size: B10: Diameter: 5mm / length: 10mm
– Size: B15: Diameter: 8mm / length: 15mm
– Size: B20: Diameter: 8mm / length: 20mm
– Size: B25: Diameter: 8mm / length: 25mm
– Size: B30: Diameter: 7mm / length: 30mm
– Size: B35: Diameter: 9mm / length: 35mm
– Size: B40: Diameter: 8mm / length: 40mm

PTFE coated magnetic stirring bars

PTFE coated magnetic stirring bars

Useful notes:

Length of stir bar depends on the flask base diameter. Normally, the stir bar length should be between 30 and 60% of the flask base diameter.
The diameter of the stir bar depends on the nature of the mixed solution. As the viscosity of the solution increases, the optimum diameter of the stir bar increases.
Speed of mixing also determines the optimum size of the stir bar; if a high mixing speed is required, smaller size stir bar should be used to reduce the vortex depth.
Please note that magnetic stirrers are more suitable for low and medium viscosity solutions. For high viscosity (thick) solutions, such as gels, mechanical (overhead) stirrers can be used.

The 1.5 Inch Raised Magnetic Stir Bar has a PTFE (Teflon) coating and features a powerful magnetic core for a strong bond to your stir plate.

These Corning magnetic stir bars are Teflon-coated for increased chemical-resistance. Bars are available in 2” x 3/8” in. (5.08 x 0.95 cm) or 1” x 3/8” in. (2.54 x 0.95 cm). 1233W94 stir bars are suitable for use with PC610/620 stirrers while 1233W95 stir bars are for use with PC210/220 and PC-410/420 stirrers.

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