Magnetic stirrers are mainly used in the pharmaceutical, food and other industries for liquid dissolution, heating and ingredients in real life and work. The role of magnetic stirrers is incomparable to ordinary stirrers. Magnetic stirrers can basically liberate our hands in the process of liquid stirring, and for some liquids that require temperature control, the stirring temperature can be changed at will to better complete liquid mixing.
I. The role of magnetic stirrer
Magnetic stirrer is a laboratory instrument used for liquid mixing, mainly used for stirring or simultaneously heating and stirring low-viscosity liquid or solid-liquid mixture. Magnetic stirrer generally has the function of stirring and heating.
1. Mix the reactants uniformly and make the temperature uniform,
2. When heating in a closed container, in order to prevent bumping, for example, in the distillation process, zeolite can be added or a magnetic stirrer can be used.
3. Speed up the reaction speed or evaporation speed, and shorten the time.
II. The principle of magnetic stirrer
The basic principle of the magnetic stirrer is to use the principle of repulsion of the same polar and attraction of the opposite polar of the magnetic field, and push the magnetic stirrer placed in the container to rotate in a circle through the magnetic field, so as to achieve the purpose of stirring the liquid. With the heating temperature control system, heating can be conducted and the sample temperature can be controlled according to specific experimental requirements, and the temperature conditions required by the experimental conditions can be maintained to ensure that the liquid mixing meets the experimental requirements.
Magnetic stirrers can be divided into thermostatic magnetic stirrers and heating magnetic stirrers. The thermostatic magnetic stirrer has an external temperature sensor, which can accurately measure and control the temperature of the liquid in the container. The heating magnetic stirrer has an external temperature controller that can monitor the temperature in the container. The magnetic stirrer is widely used for the stirring of solvents of different viscosity, and the stirring speed and heating temperature can be continuously adjusted.