EntityQ459438· pop 7· linked from 29 articlesproton magnetometerSign in to saveinstrument which measures very small variations in the Earth's magnetic fieldConnectionsseaEntityhydrogenEntityIndianaEntityarchaeologyEntityUniversity of OxfordEntitykeroseneEntityEarth's magnetic fieldEntityprecessionEntitynuclear magnetic resonanceEntitysolenoidEntitydecaneEntityelectronic amplifierEntitymagnetometerEntitybanded iron formationEntityparts-per notationEntityiron(II)Entityrecreational divingEntityneutron magnetic dipole momentEntitygeomagnetic poleEntityMartin J. AitkenEntityCategoriesDiving support equipmentGeomagnetismIndiana Historical SocietyMagnetic devices