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PTFE Magnetic Stirer Bars
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PTFE Magnetic Stirer Bars

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Item No.Specifications
(mm*mm)
Product Description
A3*6mmA magnetic stir bar is a magnet that is encased in material that won’t react with the fluid it is immersed in.  Stir bar magnets included a molded layer of PTFE (a.k.a. Teflon), which is not reactive for many liquids.
The magnet is placed within a container and made to spin with an external magnetic field.  Typically, this is produced by a stir-plate, which has another magnet rotating underneath the container.
The chief advantage of this setup is that you can stir the liquid without having something stick into the container.  The container can be completely sealed.  Without a spinning shaft sticking into the container, there are no worries about leaks or lubricants contaminating the fluid.
5*10mm
6*10.5mm
7*15mm
7*18mm
8*20mm
9*25mm
10*25mm
10*30mm
12*35mm
15*40mm
16*48mm
17*50mm
18*70mm
20*50mm
20*63mm
25*70mm
B3*8mmMagnetic stir bars are coated magnets used to stir liquids in a sealed container. They can stir fluids without requiring an opening in the container. They are a popular way of stirring liquids in modestly sized containers. Magnetic stirrers are used in chemistry and biology research, especially in medicine. Home brewers often use them to help make a yeast starter.
4*10mm
5*15mm
5*20mm
5*25mm
6*12mm
6*15mm
6*20mm
6*30mm
6*40mm
6*50mm
7*20mm
7*25mm
7*30mm
7*34mm
7*60mm
8*16mm
8*25mm
8*30mm
8*45mm
8*48mm
8.5*36mm
8.5*40mm
9*25mm
9*38mm
9*35mm
9*45
9*48mm
9*50mm
9*55mm
9*65mm
10*45mm
10*60mm
12*55mm
C1.5*9mmA stir bar is the magnetic bar placed within the liquid wihich provides the stirring action. The stir bar's motion is driven by another rotating magnet or assembly of electromagnets in the stirrer device, beneath the vessel containing the liquid.Stir bars are typically coated in teflon, or less often in glass. Glass coatings are used for liquid alkali metals (exceptlye, which will eat through glass) and alkali metal solutions in ammonia. Both coatings are chemically inert and do notcontaminate or react with the reaction mixture they are in.
They are bar shaped and often octagonal in cross-section (sometimes circular), although a variety of special shapes exist for more efficient stirring. Most stir bars have a ridge around the center (called a pivot ring) on which they rotate. The smallest are only a few millimeters long and the largest a few centimeters. A stir bar retriever is a separate magnet on the end of a long stick (usually coated with teflon) which can be used to remove stir bars from a vessel.
3*5mm
3*6mm
3*10mm
3*12mm
3*15mm
4*10mm
5*15mm
6*10mm
6*15mm
6*20mm
6*25mm
6*30mm
7*17mm
7*20mm
7*22mm
7*25mm
7*27mm
7*30mm
7*40mm
7*50mm
8*13mm
8*20mm
8*25mm
8*30mm
8*35mm
8*40mm
8*45mm
8*50mm
8*55mm
8*60mm
8*70mm
9*30mm
9*40mm
9*50mm
10*40mm
10*48mm
10*50mm
10*60mm
10*80mm
11*37mm
11*52mm
15*55mm
16*35mm
H10*20mmMagnetic stir bars are coated magnets used to stir liquids in a sealed container. They can stir fluids without requiring an opening in the container. They are a popular way of stirring liquids in modestly sized containers. Magnetic stirrers are used in chemistry and biology research, especially in medicine. Home brewers often use them to help make a yeast starter.
12*26mm
14*34mm
14*41mm
16*40mm
Octagonal8*38mmMagnetic stir bars are coated magnets used to stir liquids in a sealed container. They can stir fluids without requiring an opening in the container. They are a popular way of stirring liquids in modestly sized containers. Magnetic stirrers are used in chemistry and biology research, especially in medicine. Home brewers often use them to help make a yeast starter.
8*50mm
9*30mm
Anise Quincunx
1. inside material: alnico magnet
2. max working temperature: 270 degree centigrade
3. Application: Lab, Food, Scientific research, Medical use etc.


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