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Classifying magnetic measurement technologies

Many different technologies have been developed to measure magnetic field strength. Borrowing a representation originally developed by the CERN, the diagram below classifies them according to range and precision.

Metrolab masters four technologies: Nuclear Magnetic Resonance (NMR) and Electron Paramagnetic Resonance (EPR), FluxmetersHall and Fluxgate. These cover a flux-density range of ten orders of magnitude, and include the world’s most precise techniques.