Magnetic stir bars

Introduction to Magnetic stir bars

Magnetic stir bars are dedicated stirring bars placed directly into liquids, used in conjunction with magnetic stirrers to dissolve, mix solutions, or support reaction processes in laboratories. This tool allows continuous stirring in a closed environment, minimizing the risk of sample contamination or the release of toxic chemical vapors.

When selecting magnetic stir bars, users need to consider the size, shape, and magnetic core material to match the solution viscosity and vessel volume. Hoa Viet currently supplies magnetic stir bars from Vitlab (Germany) featuring AlNiCo V permanent magnet cores (aluminum–nickel–cobalt alloy) that ensure long-lasting, stable magnetic strength. The distinctive angular design enhances liquid turbulence, with a wide range of size options such as 2x5mm, 3x8mm, 4.5x12mm, 6x10mm, 7x20mm, 8x40mm, 10x70mm, and 27x57mm.

What type of magnet core do Vitlab magnetic stir bars use?

Vitlab magnetic stir bars are equipped with an AlNiCo V permanent magnet core made of an aluminum-nickel-cobalt alloy. This material helps the stir bar maintain strong and stable magnetism over long periods of use.

What is the purpose of the beveled design of Vitlab magnetic stir bars?

The special beveled design helps enhance the turbulence of the liquid flow during stirring. This structure optimizes uniform mixing and accelerates solution dissolution.

Which brand of magnetic stir bars is Hoa Viet currently distributing?

Hoa Viet currently distributes specialized magnetic stir bars from the German brand Vitlab. To choose the right size for your vessel volume, please contact Hoa Viet for technical support and consultation.

How should the size of a magnetic stir bar be selected for laboratory flasks?

The magnetic stir bar size must be compatible with the vessel base diameter and stirring volume to avoid spinout. Small sizes like 2x5mm or 3x8mm are suitable for test tubes or micro-volumes, while sizes like 8x40mm, 10x70mm, or 27x57mm are ideal for large Erlenmeyer flasks and beakers.