Precautions When Using a Magnetic Stirrer

Magnetic stirrers come in heating and non-heating versions. Their basic principle uses magnetic repulsion between like poles and continuously changing base polarity to rotate the stir bar. Magnetism is therefore essential, and demagnetization should be avoided during everyday use.

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How Heating Magnetic Stirrers Work

The actual speed of a hotplate magnetic stirrer depends on load and voltage. Voltage fluctuations within the permitted range and changes in the medium's viscosity can affect speed. Motor speed can be adjusted to suit experimental requirements.

How Laboratory Temperature-Controlled Stirrers Work

A magnetic stirrer uses a small motor to rotate a strong heat-resistant magnet, generating a rotating field that drives the stir bar inside the vessel. Together with heating, this enables thorough mixing and reaction at a set temperature. Applications include biology, medicine, chemistry and chemical engineering.