Technology

Principles of Magnetisation

The basics of magnetisation and how Hirst uses a capacitive discharged approach coupled with microprocessor control to deliver 100J to over 400kJ magnetiser energies. Building on its experience from the 1960s to present day to deliver some of the best performing and reliable magnetisers on the market.

Magnetisation of permanent magnets

Magnet calibration

The basics of magnet calibration and setting plus an over view of Hirst’s range of MCSD systems (Magnetiser Calibrator Setter Demagnetiser) are designed for knockback and the precision setting and calibrating of permanent magnets.

Magnet calibration

Principles of demagnetisation

Materials capable of holding magnetisation can be considered to be many separate domains each acting as a tiny magnet.  When a material is magnetised these “tiny magnets” are all aligned in the same direction.

To demagnetise an item the objective is to totally randomise these “tiny magnets” so they all point in different directions.

Principles of Demagnetisation

Hirst Technology and patents

Hirst Magnetic Instruments has been active in providing solutions for 60 years in magnetics and magnetic measurement. Other than a lot of know how and experience developed along the way the company has an extensive patent and trademark portfolio.

Intellectual Property

Magnet basics

Basic magnet and magnetic terminology guide all in one place.

magnet basics

Pulse field magnetometry

The Pulsed-Field Magnetometer (PFM) is an internationally recognised standard device for the complete characterisation of modern magnetic materials. The PFM is an accurate and reliable magnetometer suitable for the scientific investigation of ferromagnetic materials. The fast measurement also makes the PFM the ideal tool for bulk testing, i.e. in quality assurance applications.

PFM technology webpage