Stirring Bars and Rods
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Stirring Bars and Rods
Products of various sizes, shapes, and material compositions designed to aid in manual or automatic stirring of laboratory solutions. Includes glass stirring rods, magnetic stir bars, and stir bar retrievers.
What Is a Magnetic Stir Bar?
Magnetic stir bars are stirrers or stirring hotplates used with magnets to mix a liquid or solution by creating a vortex.
A number of factors affect magnetic stir bar efficiency and effectiveness, including its size, shape, and material. Sizes (L x Diameter) range from 2 x 2 mm to 159 x 27 mm and shapes include:
- Polygonal or octagonal magnetic stir bars are the most common shapes; the multiple surfaces add turbulence to the mixing action
- Elliptical or egg-shapped stir bars work especially well with round-bottom flasks
- Wedge-shaped spin bars produce more significant turbulence for dissolving salts or in samples containing sediment
- Spin bars with fins or vanes, designed for smaller vessels, tubes, or cuvettes
- Micro (“flea”) stir bars for mixing extremely small samples
What Kind of Magnet Is Used?
Stir bar magnets are typically made from Alnico, a combination of aluminum and nickel. They may also be made from Samarium cobalt, a rare earth metal that produces the stronger magnetic force needed to mix very viscous substances.
Stir bar magnets are usually encapsulated in white or colored PTFE, hard plastic, or borosilicate glass, and coatings may meet FDA grade or USP requirements. PTFE is durable, inert, and can be autoclaved. Glass-encased cylindrical magnets are useful for high-temperature applications.
How Does It Work?
During the stirring process, integral or removable pivot rings on the stir bar reduce contact with the vessel to help avoid marring plastic surfaces. Some round stir bars have slightly raised ends that create a de facto pivot point, while others have more pronounced round centers that help to keep them in motion. Stir bars may be reusable or disposable.
Magnetic stir bars may be sold individually or in magnetic stir bar kits that include multiple bars in a range of sizes.
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BRAND™ Oval Shape PTFE Magnetic Stirring Bars
PTFE construction. Ideal for vessels with round bottom, such as a round-bottom flask.
Da utilizzare con (apparecchiatura) | For vessels with round-bottom |
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Forma | Oval |
Materiale | PTFE |
Da utilizzare con (apparecchiatura) | Ideal for containers/ bottles with round bottoms |
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Quantità | 10/Pk. |
Forma | Oval |
Materiale | Magnet,PTFE |
Cowie Technology™ Cylindrical PTFE Stir Bars
Provides stable stirring action. Cowie Technology™ Cylindrical PTFE Stir Bars are a popular general-purpose stirrer for a wide variety of applications.
Da utilizzare con (apparecchiatura) | Contenitori e vasi/piastre riscaldanti per agitatore |
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Colore | Bianco |
Forma | Cilindrico |
Autoclavabile | Sì |
Descrizione | PTFE encapsulated Alnico V magnet core |
Certificazione/Conformità | Certificato di conformità, certificato di analisi, scheda dei dati del prodotto, scheda di sicurezza dei materiali (MSDS) |
Fisherbrand™ PTFE Magnetic Stir Bars with Pivot Ring
Used in containers with bases that are slightly curved or uneven.
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Fisherbrand™ Triangular PTFE Stir Bars
Effective for dissolving solids and mixing sediments due to scraping-like action on the base of the container. Fisherbrand™ Triangular PTFE Stir Bars provides stable stirring action for flat-bottom containers.
Da utilizzare con (apparecchiatura) | Contenitori e vasi/piastre riscaldanti per agitatore |
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Colore | Bianco |
Forma | Triangolare |
Autoclavabile | Sì |
Descrizione | Interno magnetico Alnico V incapsulato in PTFE |
Certificazione/Conformità | Certificato di conformità, certificato di analisi, scheda dei dati del prodotto, scheda di sicurezza dei materiali (MSDS) |
Fisherbrand™ Square Economy PTFE Stir Bars
Effective stirrer, especially at low speeds. Fisherbrand™ Square Economy PTFE Stir Bars are guaranteed inert and leak-free.
Da utilizzare con (apparecchiatura) | Containers & Vessels / Stirrer Hot Plates |
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Quantità | 25/Pk. |
Colore | White |
Autoclavabile | Autoclavable |
Descrizione | PTFE encapsulated Alnico V magnet core |
Certificazione/Conformità | Certificate of Conformance, Certificate of Analysis, Product Data Sheet, Material Safety Data Sheet (MSDS) |
Fisherbrand™ PTFE Stir Bars with Pivot Ring
Provides stable stirring action. Fisherbrand™ PTFE Stir Bars with Pivot Ring are ideal for containers with uneven or unusual bottom surfaces and shapes.
Fisherbrand™ Oval PTFE Turbo Stir Bars with Rare Earth Core
Fisherbrand™ Oval PTFE Turbo Stir Bars with Rare Earth Core use rare earth magnets to provide significantly increased magnetic strength compared to Alnico magnets.
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Da utilizzare con (apparecchiatura) | Round Bottom Flasks |
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Quantità | 2/Pk. |
Colore | White |
Forma | Oval |
Materiale | PTFE |
Autoclavabile | Autoclavable |
Descrizione | PTFE encapsulated Samarium-Cobalt magnet core |
Certificazione/Conformità | Certificate of Conformance, Certificate of Analysis, Product Data Sheet, Material Safety Data Sheet (MSDS) |
Cowie Technology™ Box Set of 22 Cylindrical and Removable Ring PTFE Stir Bars
Cowie Technology™ Box Set of 22 Cylindrical and Removable Ring PTFE Stir Bars includes an assortment of useful Cylindrical and Removable Ring Stirrer Bar sizes in a reusable container.
Fisherbrand™ Octagon Spinbar™ Magnetic Stirring Bars
Octagon magnetic stirring bars with integral pivot ring are the most commonly used shape for stirring small volumes in vessels such as vials, tubes and gradient makers.
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Colore | White |
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Materiale | Alnico Magnet |
Autoclavabile | Autoclavable |
Rivestimento | PTFE |
Certificazione/Conformità | ISO 9001:2008 |
Fisherbrand™ Cylindrical PTFE Stir Bars
Fisherbrand™ Cylindrical PTFE Stir Bars have a smooth, round profile. A Popular general purpose stirrer for a wide variety of applications
Quantità | 1 |
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Materiale | PTFE with Alnico V Magnet Core |
Descrizione | Fisherbrand™ Cylindrical PTFE Stir Bars |
Diametro (sistema metrico) | 12 mm |
Temperature Range (Metric) | -200°C to +280°C |
Fisherbrand™ Hub-Shaped Stir Bars
Provides very stable stirring, especially at low speeds. Fisherbrand™ Hub-Shaped Stir Bars are isostatically molded in pure, FDA-approved PTFE plastic.
Da utilizzare con (apparecchiatura) | Containers & Vessels / Stirrer Hot Plates |
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Quantità | 1/Ea. |
Colore | White |
Autoclavabile | Autoclavable |
Descrizione | PTFE encapsulated Alnico V magnet core |
Certificazione/Conformità | Certificate of Conformance, Certificate of Analysis, Product Data Sheet, Material Safety Data Sheet (MSDS) |
Fisherbrand™ PTFE Stir Bars with Removable Ring
Stir contents inside flasks and other vessels for complete mixing. Fisherbrand™ PTFE Stir Bars with Removable Ring are available in a number of sizes to accommodate both small and large mixing jobs.
Da utilizzare con (apparecchiatura) | Containers & Vessels / Stirrer Hot Plates |
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Colore | White |
Forma | Cylinder |
Autoclavabile | Autoclavable |
Descrizione | PTFE encapsulated Alnico V magnet core |
Include | PTFE Ring |
Certificazione/Conformità | Certificate of Conformance, Certificate of Analysis, Product Data Sheet, Material Safety Data Sheet (MSDS) |
Corning™ PTFE-Coated Magnetic Stir Bars
Greener Choice Product
This product offers one or more environmental benefits itemized in the U.S. FTC Green Guides.
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This product offers one or more environmental benefits itemized in the U.S. FTC Green Guides.
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For use in Corning Hotplate Stirrers
Quantità | 1 |
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Materiale | Magnet |
Quantità | 1 Ea. |
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Tipo | Stir Bar |
Forma | Egg |
Materiale | PTFE |