Product ID: SMON6018
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Magnetic Stir Bars, also known as stirrers or spin bars, are magnetized rods typically made of a strong magnet encased in chemically inert materials like PTFE (polytetrafluoroethylene), ensuring resistance to corrosion and chemical reactions. They are designed for use in laboratories to stir solutions effectively without contamination, as they remain submerged in the liquid during mixing. When placed on a magnetic stirrer, the bar rotates rapidly, creating a vortex that ensures uniform mixing of liquids. Magnetic Stir Bars are available in various shapes and sizes to accommodate different vessel types and liquid volumes, offering efficient, hands-free mixing for scientific experiments and chemical reactions.
Related Products: Neodymium Block Magnet
Material |
NdFeB |
Grade |
N42H |
Sizes |
8mm dia. x 20/25/40mm long 9.5mm dia. x 50mm long |
Plating/Coating |
Molded PTFE, White |
Magnetization Direction |
Axial (along the long length) |
Weight |
0.107 oz (3.04 g) |
Max Operating Temp |
248ºF (120ºC) |
Brmax |
13,300 Gauss |
BHmax |
42 MGOe |
Magnetic Stir Bars are widely used in laboratories and industries for efficient, hands-free mixing of liquids in applications ranging from chemical and biological experiments to industrial processes. In chemical and biological laboratories, they are essential for mixing solutions, dissolving solids, and aiding in titrations, ensuring uniformity during reactions. In the pharmaceutical and biotech industries, Magnetic Stir Bars are used for preparing compounds, drug formulations, and bioreactors to promote cell growth. The food and beverage industry employs them to create emulsions, disperse ingredients, and conduct quality control testing. Additionally, they are used in environmental and water testing labs for mixing water samples to monitor contaminants, and in educational labs for demonstrations and experiments. Their versatility and ability to ensure contamination-free mixing make them indispensable in a wide range of scientific and industrial settings.
Our Magnetic Stir Bars are carefully handled during storage and transportation to preserve the quality of our product in its original condition.
Q1: What materials are magnetic stir bars made from?
A1: Magnetic stir bars are typically made from strong magnets, usually Alnico or neodymium, encased in chemically inert materials like PTFE (Teflon), which provides excellent resistance to chemicals, heat, and corrosion, ensuring compatibility with a wide range of solutions.
Q2: How do I choose the right size and shape of a magnetic stir bar?
A2: The size and shape of the magnetic stir bar should be chosen based on the volume of liquid you are stirring and the shape of the container. Larger vessels require longer stir bars for effective mixing, while smaller vessels or narrow containers benefit from shorter or cylindrical bars. Specific shapes like octagonal or pivot rings can enhance mixing efficiency in certain applications.
Q3: Can magnetic stir bars be used with all liquids?
A3: Yes, magnetic stir bars are highly versatile and can be used with most liquids, including corrosive chemicals, as long as they are made from materials like PTFE that are resistant to chemical attack. However, extremely viscous liquids may require more powerful stirring devices for effective mixing.
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