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  • Dynalon PTFE Beaker Magnetic Stir Bar
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by Dynalon

Dynalon PTFE Beaker Magnetic Stir Bar

Available in multiple versions


Price: $25.28 - $34.06
Product Specifications
Brand Name Dynalon
Material Type Polytetrafluoroethylene (PTFE)
UNSPSC Code 41121802

The Dynalon beaker stir bar has a white PTFE casing and an internal magnet ... Read full product description



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44mm Diameter, Beaker capacity: 100mL B0046A90G0
In Stock (2)
$25.28
Prime Eligible
62mm Diameter, Beaker capacity: 250mL B0046A90HE
In Stock (1)
$33.96
Prime Eligible
70mm Diameter, Beaker capacity: 400-500mL B0046A90K6
In Stock (2)
$34.06
Prime Eligible
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Product Features

  • Star shape with four rectangular arms and a solid, flat circular center (also called a stir bar)
  • Fills the inside diameter of a beaker to create a vortex to the bottom of the container
  • PTFE casing is chemically inert, can be used with corrosive chemicals, and helps reduce friction and wear while spinning
  • For stirring applications at slow to moderate speeds
  • Internal magnet made from alnico beaker V, an alloy of aluminum, nickel, iron, and cobalt

Product Details


Product Description

The Dynalon beaker stir bar has a white PTFE casing and an internal magnet made from alnico V (an alloy of aluminum, nickel, iron, and cobalt) for laboratory stirring applications. The beaker stir bar has four rectangular arms and a solid, flat circular center (also called a star shape), and it fills the inside diameter of a beaker to create a vortex to the bottom of the container at slow or moderate speeds. The magnet sits inside a polytetrafluoroethylene (PTFE) casing, which is chemically inert, can be used with corrosive chemicals, and helps reduce friction and wear while spinning. The bar is for stirring applications at slow to moderate speeds.

Magnetic stir bars (sometimes called stirring bars, spin bars, or fleas) are used to stir a liquid or solution in biological, chemical, medical, and research laboratory applications. The stir bar is placed inside a container of liquid or solution that is seated on a magnetic stirrer (also called a magnetic mixer), which is a laboratory device that creates a rotating magnetic field using a rotating magnet or multiple stationary electromagnets. The rotating magnetic field causes the bar to spin, which stirs the liquid or solution. Stirring bars are offered in a variety of sizes and shapes, and they are encased in materials such as glass or plastic to help prevent contamination of the liquid or solution, to reduce friction, and to provide resistance to chemicals, abrasion, and heat. The bar may have a pivot ring or pivot point to minimize contact with the container, reduce friction, and improve its spinning. The size and shape of the container and the volume and viscosity of the liquid or solution to be stirred determine which stir bar shape, size, and casing will suit a particular application.

Dynalon manufactures plastic labware and supplies under brands such as Cowie, Kartell, and Sterilin. The company, founded in 1957, is headquartered in Rochester, NY.


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