Achieve powerful, consistent mixing in your laboratory with Heathrow Scientific's Octagonal Magnetic Stir Bars. Engineered to handle everything from simple aqueous solutions to highly viscous mixtures, these premium stir bars are driven by an ALNICO core—one of the strongest permanent magnets available. The specialized low-friction octagonal profile, combined with an integrated center pivot ring, creates an aggressive, deep mixing vortex while significantly reducing surface contact to prevent drag.
Durability and sample integrity are paramount when working with aggressive solvents and high temperatures. Each ALNICO magnet is securely encapsulated in a chemically inert, highly resilient PTFE casing using a specialized sintered manufacturing process. This advanced construction prevents dangerous magnetic decoupling ("spin outs") at high speeds and ensures the core is fully protected from corrosive chemicals. Fully autoclavable and rated for extreme temperatures up to 250°C, these stir bars seamlessly transition between unheated stirring and high-temperature heated magnetic stir plates.
Features & Benefits
- Premium ALNICO Core: Powered by an ultra-strong permanent magnet that maintains its strength over time and resists decoupling during high-speed rotation.
- Octagonal Pivot Ring Design: The angled edges and raised center ring minimize bottom contact friction while maximizing vortex strength in viscous liquids.
- Sintered PTFE Encapsulation: The seamless PTFE exterior is chemically inert, non-contaminating, and incredibly easy to clean between experiments.
- High Thermal Tolerance: Safely withstands continuous operating temperatures up to 250°C, making them ideal for heated stirring applications.
- Autoclavable: Can be safely sterilized for biological and sterile media preparation workflows.
Technical Specifications
| Specification | Detail |
|---|---|
| Magnet Core Type | ALNICO (Permanent Magnet) |
| Exterior Coating | PTFE (Teflon™) |
| Shape | Octagonal Cylinder with Center Pivot Ring |
| Maximum Temperature | 250°C (482°F) |
| Sterilization | Fully Autoclavable |
| Packaging | Pack of 10 |
LabSupplies.com is an authorized distributor of Heathrow Scientific. All magnetic stir bars are sold in bulk packs of 10 and ship directly from our verified USA warehouse.