National Physical Laboratory

Validation of magnetic measurement systems and calibration of magnetic measurement instrumentation

Magnetic measurement systems 

Magnetic measurements can be carried out at NPL on a wide variety of magnetic instruments and materials. The parameters and ranges offered are continuously developed to meet the needs of new measurement standards and techniques. All measurement services are UKAS accredited and details of the scope and uncertainties offered can be found using this link to UKAS.

Traceability to the primary standards of mass, length, time and the ampere is established through calibrated derived standards together with well established measurement techniques.

DC measurements depend upon traceability either to frequency, using magnetic resonance, or length and the ampere using search-coils and flux integrators. This forms the basis for the calibration of magnetic flux and field measuring devices which in turn are used to determine the properties of magnetic materials.

AC measurements derive their traceability from the electrical standards of frequency, current, voltage and resistance.

The range of instruments for which a calibration service is provided includes:

  • Fluxgate magnetometers
  • Hall effect gaussmeters
  • Reference magnets
  • Helmholtz coils
  • Standard solenoids
  • Search coils
  • Flux integrators
  • Portable field meters for EMC measurements
  • Antenna calibrations up to 100 kHz with uncertainties less than 1 %


Customer Service tel: +44 20 8943 8681

Last Updated: 18 Aug 2015
Created: 11 Jun 2009


Please note that the information will not be divulged to third parties, or used without your permission