An NMR analyser is a device that enables the molecular structure of a material to be analysed using nuclear magnetic resonance, that is, by observing and measuring the interaction of the spins of atomic nuclei when they are placed in a strong magnetic field.
Electron microscopes and X-ray diffraction instruments can also be used to analyse the molecular structure of a substance at the atomic level, but the advantages of an NMR spectrometer lie in the fact that this method requires less elaborate sample preparation and has less impact on their structure.