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  • Scienceware 371190002 PTFE Saturn Micro Flea Spinbar Magnetic Stirrer Bar, 2mm x 2mm Size
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Scienceware 371190002 PTFE Saturn Micro Flea Spinbar Magnetic Stirrer Bar, 2mm x 2mm Size


Price: $5.80 ($5.80 / Each) & FREE Shipping on orders over $35. Details
Only 5 left in stock (more on the way).
Ships from and sold by Amazon.com. Gift-wrap available.
0.079 x 0.079" (2 x 2mm)
  • Round, cylindrical shape provides better centering and creates less turbulence than a multisided shape
  • Teflon (PTFE) casing is chemically inert, can be used with corrosive chemicals, and helps reduce friction and wear while spinning
  • Smooth surface provides quicker cleanup and less risk of cross-contamination than bars with pivot rings and allows the bar to spin on the bottom of the container to disperse light sediment and air bubbles
  • Internal magnet made from alnico V, an alloy of aluminum, nickel, iron, and cobalt
  • For stirring small volumes of liquid in containers such as test tubes, vials, and gradients
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2 new from $5.80

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$5.80 ($5.80 / Each) & FREE Shipping on orders over $35. Details Only 5 left in stock (more on the way). Ships from and sold by Amazon.com. Gift-wrap available.

Technical Details

Size: 0.079 x 0.079" (2 x 2mm)
  • Brand Name: Bel-Art Products
  • Part Number: 371190002
  • Material Type: PTFE (Polytetrafluoroethylene)
  • Number of Items: 1
  • Item Package Quantity: 1

Product Description

Size: 0.079 x 0.079" (2 x 2mm)

Stirring Bar, PTFE Material, PTFE Coating, Octagonal Shape, Size 2 x 2mm, White

Product Information

Size: 0.079 x 0.079" (2 x 2mm)
Technical Details
Part Number 371190002
Item Weight0.8 ounces
Product Dimensions4.5 x 3 x 0.1 inches
OriginUSA
Item model number371190002
Size0.079 x 0.079" (2 x 2mm)
ColorWhite
MaterialPTFE (Polytetrafluoroethylene)
Item Package Quantity1
Cutting Diameter2 millimeters
  
Additional Information
ASINB002VBW5UY
Best Sellers Rank #184,252 in Office Products (See top 100)
Shipping Weight0.8 ounces (View shipping rates and policies)
Domestic Shipping Item can be shipped within U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Date First AvailableNovember 3, 2009
  
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From the Manufacturer

Magnetic Stirring Bar Selection & Use

Magnetic stirring is used in a number of common laboratory procedures, yet the importance of selecting the best stirring bar for each particular application is often overlooked. The drive magnet, vessel shape, viscosity and abrasiveness of the materials should all be considered when choosing the size, shape and materials (coating and magnet) of the magnetic stirring bar in order to achieve effective, efficient stirring results.

First, let’s discuss magnetism. On the most basic level, we know that opposite poles attract. A magnetic stirrer has a drive magnet, generally a bar or U-shape made of a metallic alloy or a ceramic which rotates powered by a drive motor. The magnetic poles of the drive magnet are typically about two inches apart in bench top models, and can be up to six inches apart in larger units used to mix 50 gallons of liquid solution. For optimum magnetic coupling the distance between the magnetic poles of the drive magnet and the length of the stirring bar should be equal. Bars too long or too short in proportion to the drive magnet will not have optimum coupling which is important to reduce spinout.

Once a magnetic stirring bar has been placed in a container with solution, it should be positioned directly over the center of the drive magnet. The stirring speed should be increased slowly, until the desired vortex pattern is achieved. Should the magnetic stirring bar lose its coupling with the drive magnet because of the speed of the drive magnet, viscosity of the fluid, or an improperly selected stirring bar length, it is said to have 'spun-out.'

Vertical distance between the drive magnet and the stirring bar should be kept to a minimum for the best coupling and stirring efficiency. Therefore, the containing vessel should be as thin as practical.

The selection of the shape of the magnetic stirring bar also influences the resulting vortex in that multi-sided shapes may be more efficient in moving solutions and certain shapes have been designed to provide a tailored fit in specialty vessels such as test tubes, cuvettes and spectrophotometer cells.

Magnetic stirring bars are generally made of ALNICO (an alloy of aluminum, nickel, iron and cobalt) magnets encapsulated in an FDA approved PTFE coating. In addition, magnetic stirring bars also use high energy magnetic materials, such as Samarium Cobalt which increases strength of coupling with a drive magnet and helps to reduce spinout when mixing viscous solutions or mixing at high speeds.

Newer to the market, the Bel-Art Products Spinfinity magnetic stirring bars use ALNICO magnets encapsulated in plastic for increased durability in granular slurries.

Use for General Stirring Applications Use for High Temperature Stirring Applications Use for Viscous Solutions High Speed Stirring Applications Use for Abrasive Slurries Extended Stirring Applications
Brand/ Type Spinbar Teflon PTFE Spinbar Pyrex Glass Spinbar Rare Earth Samarium Cobalt Spinfinity
Magnetic Type Alnico Alnico Samarium Cobalt Alnico
Covering Teflon PTFE Clear Pyrex Glass Teflon PTFE Plastic
Features/ Benefits Wide selection of shapes and sizes to fit vessels of all types; Individual shapes create different vortexes for efficient and effective stirring Heated stirring applications up to 274°C (525°F) Reliable Magnetic Coupling – Superior magnetic energy reduces frequency of spinout in the most vigorous applications Durable – Last 2.5 to 3 times longer under conditions known to traditionally cause material breakdown
FDA grade Teflon PTFE low friction coating is durable and inert Glass casing has zero absorption and porosity FDA Grade Teflon PTFE low friction coating is durable and inert Outer shell made from FDA approved materials
Color selection for color-coding work processes Distinct Color – Green color lets you quickly identify Spinbar Rare Earth Samarium Cobalt Distinct Color – Quickly identify the Spinfinity difference by its purple color

Micro (Flea) Spinbar Magnetic Stirring Bars

Actual Size

Model 37119-0127

Micro (Flea) Spinbar Magnetic Stirring Bars

Micro (Flea) magnetic stirring bars are designed for stirring small volumes in vessels such as vials, tubes and gradient makers.

  • Particularly useful for environmental testing and life science applications in which small sample volumes need to be prepared and evaluated
  • Alnico magnet encapsulated in FDA Grade, USP Class VI Teflon PTFE low friction coating; durable and inert
  • Manufactured in a registered ISO 9001:2008, as verified by SGS certification
  • Autoclave safe
F37119-0002 F37119-0003 F37119-0005 F37119-0635 F37119-0007 F37119-0008
Size 0.079 x 0.079" (2 x 2mm) 0.118 x 0.118" (3 x 3mm) 0.197 x 0.079" (5 x 2mm) 0.250 x 0.118" (6.4 x 3mm) 0.276" x 0.079" (7 x 2mm) Square Ends 0.315" x 0.059" (8 x 1.5mm) Square Ends
F37119-1083 F37119-0083 F37119-0010 F37119-0127 F37119-0015
Size 0.315" x 0.118" (8 x 3mm) With Pivot Ring 0.315" x 0.118" (8 x 3mm) 0.394" x 0.118" (10 x 3mm) 0.500" x 0.118" (12.7 x 3mm) 0.591" x 0.059" (15 x 1.5mm)

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Scienceware 371190002 PTFE Saturn Micro Flea Spinbar Magnetic Stirrer Bar, 2mm x 2mm Size
This item: Scienceware 371190002 PTFE Saturn Micro Flea Spinbar Magnetic Stirrer Bar, 2mm x 2mm Size
Price: $5.80
Ships from and sold by Amazon.com