The remanence, coercivity, maximum energy product and demagnetisation curve of a range of magnetically hard materials can be determined in accordance with IEC 60404 Part 3: 1995.

• Conventional metal magnets, e.g. alnico and alcomax
• Ferrites
• Cobalt platinum
• Rare earth cobalt
• Neodymium iron boron

The magnetic moment of permanent magnets is being used for 100 % quality control when the magnets are used in safety critical situations. The measurement method is electrical and the calibration of the individual instruments would be costly and often not convenient. A reference magnet can therefore be calibrated at NPL and this is used to provide a daily check of the calibration of customer systems.

A pulse magnetise is available that can achieve a peak magnetic flux density of approximately 8 T. Calibration of instruments that are used to measure magnetic fields with this type of time profile can be calibrated using this system.

Contact

Customer Service tel: +44 20 8943 8681
E-mail: materials_enquiries@npl.co.uk