Types of Stirrers

Types of Stirrers

There are several types of stirrers available for use in the laboratory. Below is a list of types of stirrers and specific uses:

Magnetic stirrers

The stirrers use a magnetic field that rotates to lead to a bar spinning within the fluid, hence stirring. The majority of the magnetic stirrers are used for low viscosity and small volumes of liquids. Some models have, however, been created to deal with high viscosity and large volumes. 

Plates of the magnetic stirrers are mostly made of stainless steel or ceramic: ceramic hotplates have exceptional resistance to chemicals, hence the ideal option for a corrosive chemical that may spill on the top plate surface. The white top surface allows clear visibility during titrations where the color is a vital aspect. Stainless steel, on the other hand, facilitates powerful action in stirring, hence better coupling.

Stirrer hotplates

The stirrers and hotplate can be used separately or combined. The stirrer hotplates are made of different materials, such as ceramic and aluminum top plates. Aluminum-made top plates can withstand accidental dropping as compared to ceramic hotplates. Metal hot plates give a constant temperature throughout the plate, with the plate edges becoming hot.

Overhead stirrers

The stirrers are made of rods; the stirrer, stands, and paddles. Overhead stirrers are mainly used for a dense and large volume. The different types of paddles make the applications unique due to varying motions of stirring: tangential flow, axial flow, and radial flow.

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Specialty stirrers

Submersible stirrers

Submersible stirrers are sealed stirrers appropriate for submerging in oil or water and can be used in a great temperature range. It is suitable for ovens, incubators, and water baths.

Biological stirrers

The stirrers are designed to stir samples like cell cultures and other biological items. Biological stirrers offer heat-free and gentle stirring. Every stirrer has varying qualities that make it more suitable for particular use than others.

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