Magnetic Resources | Permag Blog and Technical Support

Magnetic Calculators

AL Inductance Calculator

Ferrite Gapping Calculator

Field Calculations for a Rectangle

Field on Axis of a Ring Magnet

Field on Axis of a Cylindrical Magnet

Field Calculations for a Permanent Magnet Dipole

Pull Strength on Steel for a Rectangle

Pull Strength of Steel for a Cylinder

White Papers and Technical Information

Coatings

BarrierMax Coating
Dexter Magnetic Technologies has developed its own process for coating NdFeB magnets with BarrierMaxTM Parylene C, which provides superior performance.
Parylene Family
Dexter Magnetic Technologies has developed its own process for coating NdFeB magnets with BarrierMaxTM Parylene C, which provides superior performance.
Nickel Plating-Overview
Nickel plating can be divided into two categories, electroless and electrolytic. Nickel plating is generally considered for application as a barrier coating, not as a sacrificial/ anodic coating.
Aluminum Coatings-Overview
Because aluminum is relatively soft, it is less likely to be a source of crack initiation as a coating on substrates harder than itself. Therefore, it finds application on aerospace fatigue parts.
NdFeB-Coating
Refer to the table within this paper for coating options for fully sintered Neodymium Iron Boron permanent magnets.
Hermetic Sealing of Magnets in Implantable Medical Devices
This whitepaper explores the significance of hermetic seals in such devices, delving into their definition, relevance, applications, biocompatible materials, sealing techniques, and testing methods.

Mapping & Measuring

Stray Field Considerations for Medical Products
In this article, we will discuss the magnetic moment, the design of magnetic devices, how to control stray fields and magnetic field shaping.
Magnetic Measuring
Stray field is mostly driven by the net magnetic moment of the magnets or assemblies. For a magnet, the magnetic moment is the product of its intrinsic flux density Bdi and volume (V).
3-Axis Magnetic Field Mapping in System Design Validation
The axial disc magnets from Dexter come in standard sizes and technical specifications. Use the technical specifications chart to find the magnet for your requirements.
Low-Cost Helmholtz Method for Magnet Testing
The Helmholtz coil test method is well suited to modern high coercivity magnet materials and can be implemented at relatively low cost.

DXT Powered by Dexter

Electron Energy Corporation (EEC)

Separation

Magnetic Separators for Life Sciences and their Performance
Magnetic separators are used during a variety of magnetic carrier-based purification and bead coating processes such as protein separations, nucleic acid isolations, and immunodiagnostics
Attraction of Medical Magnets
By placing the vessel into the magnetic separator, the targeted entities move to the side of the vessel because of the magnet field. The remaining fluid can then be removed.
Magnet Design Considerations for High Gradient Magnetic Separations
An overview of the magnetics systems used in biological high-gradient magnetic separation (HGMS) is presented. The magnetic design parameters of arrange of separation devices are discussed.
Biomagnetic Separation and Resuspension, Overview
In Vitro Diagnostics (IVD) and Life Science applications are increasing their use of magnetic particles, and therefore the improvement of magnetic separation continues.
Biomagnetic Separator LifeSep 384S
Faster particle separation, due to both strength of magnetic design and a shortened distance of travel, reduces clumping while capturing most if not all of the target.
Dexter LifeSep® Biomagnetic Separation Units
DMT’s line of optimized magnetic separators is designed for the most widely used tube sizes and platforms including 1.5 mL and 2 mL sizes through larger 15 mL and 50 mL tubes.
High Gradient Magnetic Separator Design with Hybrid Poles and Increased Efficiency
In this article, we analyze the efficiency of high gradient magnetic separator (HGMS) designs in terms of efficient use of magnetic energy.
CoreMag2T
In the last two decades, magnetic cell separation, facilitated by using paramagnetic colloids conjugated to antibodies, has become widely used for the separation and isolation of common and rare cell populations.

LifeSep® Data Sheets

Applications

A Comparison of Welding Methods and Their Use on Magnetized Assemblies
In magnetized assemblies, these welding methods are crucial for maintaining magnetic integrity. While MIG and TIG are accessible and versatile, EBW and LBW provide unmatched precision, low heat input, and high speed, making them essential in aerospace, automotive, and electronics sectors.
Magnetic Couplings in Medical Device Applications
design, compliance, and manufacturability. Through collaboration and innovation, magnetic couplings empower medical device developers to create safer, more efficient, and reliable devices ultimately improving clinical outcomes and enhancing the quality of patient care in the healthcare industry.
DepthStar™
Operators of deep subsea wells can benefit from the magnetic coupling technology in this new industry recognized valve design.
Permanent Magnet Basics
Our materials range from ferrite, which is low cost and low energy, to rare earth materials, which are more expensive and offer higher performance.
Magnet Designs for Magneto-electronic Thin Film Processing
Magnetic fields are pivotal in the manufacture and processing of advanced magneto-electronic thin films.
Introduction to Electromagnets
Electromagnets are comprised of three main components to produce a magnetic field, a core, coil, and current source.
Electromagnet Design Considerations
Aspects of electromagnet design considerations will be presented in this section for a design engineers’ reference.
Method to Design Magnetrons that Match Preferred Erosion Patterns
We have developed a method to predict the starting erosion pattern produced by various rotating magnetron configurations.
Magnetization Patterns
Isotropic magnets, such as Bonded Nd-Fe-B, are unoriented and have no preferred direction; therefore it is possible to magnetize them in any direction.
Hermetic Seals
The hermetic seal functions to prevent the passage of liquid, gas, and particulate, either into a protective vessel, or out of a protective vessel.
Dexter Magnetic Performance
There are many design factors that influence the choice of a magnet material, but energy product should not be at the top of the list
Innovative Medical Solutions that Improve the Quality of Life
Magnetic design is our core competency. Our goal is to enable you to take technology farther, apply advanced magnetic solutions and to take healthcare to the next level.
An MRI-Conditional Implantable Magnet Design with Self- Realigning Orientation
In this article, the authors propose an MRI-conditional implantable magnet design with orientation that can be self-realigned or with an external homing magnet.

Brochures

Medical Market Digital Brochure
Medical market capabilities and technologies.