5 Tips for Choosing a Magnetic Stirrer

If you work in a laboratory, you will require a magnetic stirrer and hot plate to stir and heat your samples. There are various models to choose from, but not all will be appropriate for your sample.

Factors To Consider When Choosing a Magnetic Stirrer

The Volume of the Fluid

The capacity is one of the major factors that determine the choice of a magnetic stirrer. You can use small, large-capacity, or multi-unit stirrers depending on the volume of your sample. However, the stirrer may not handle the specified volumes on hot plates if you deal with high viscosity fluids.


The level of accuracy depends on the choice of the stirrer. You can either go for a digital or analog stirrer. The latter have less control over stirring speed and temperature, thus less accuracy. If your sample requires a high degree of accuracy, you can settle for digital stirring equipment.

Range and Consistency

The composition of the top plate determines the temperature range and consistency of a hot plate. It can either be ceramic, aluminum, or porcelain. Both ceramic and porcelain plates heat quickly and are resistant to corrosion.


If you are dealing with a vicious or low viscous sample, you will have concerns about the ability of the stirring bar to stir the solution effectively. The determining factors are; the sample size, shape and size of the magnetic bar and plate, and the stirring speed.

Safety Features

The safety of the user should always come first. When using a hot plate stirrer, ensure you understand safety features from 2mag products. There’s a speed ramping to control speed, a hot top warning indicator, and a safety shield for splash and spill protection.

It is important to consider the factors mentioned above before choosing the appropriate stirring bar for your sample. The correct stirrer will guarantee you the accuracy and consistency of your application.