A magnetic stirrer is a device that forces liquid and gas media to convect and mix uniformly. The type, size, speed, power and other parameters of the agitator have an important impact on the effect of media stirring and mixing. Different stirring processes need to be realized by the operation of different stirring devices. When selecting the type, first of all, the purpose and requirements of the stirring operation should be based on the process. The following is an introduction that how to troubleshoot magnetic stirrers.