Electron paramagnetic resonance (EPR) wani nau'in fasaha ne na maganadisu wanda ya samo asali daga lokacin maganadisu na electron da ba a haɗa su ba. Ana iya amfani da shi don gano ƙididdiga da ƙididdiga waɗanda ba a haɗa su da electrons ɗin da ke cikin kwayoyin halitta ko kwayoyin halitta, da kuma bincika su. Halayen tsari na yanayin kewaye. Don radicals na kyauta, lokacin maganadisu na orbital kusan ba shi da wani tasiri, kuma yawancin jimlar maganadisu (sama da 99%) suna ba da gudummawa ga juzu'in wutar lantarki, don haka resonance na lantarki kuma ana kiransa "electron spin resonance" (ESR).

Tsohon masanin kimiyyar Soviet E·K·Zavois ne ya fara gano ƙarfin wutar lantarki a cikin 1944 daga MnCl2, CuCl2 da sauran gishirin paramagnetic. Masana kimiyya sun fara amfani da wannan fasaha don nazarin tsarin lantarki, tsarin crystal, lokacin dipole, da tsarin kwayoyin halitta na wasu hadadden kwayoyin halitta. Dangane da sakamakon ma'aunin resonance na lantarki na paramagnetic, masanan sunadarai sun fayyace haɗin sinadarai da rabe-raben electron a cikin hadaddun mahadi na kwayoyin halitta, da kuma matsaloli da yawa masu alaƙa da tsarin amsawa. American B. Commoner et al. sun gabatar da fasahar resonance na electron paramagnetic resonance a fannin ilmin halitta a karon farko a shekarar 1954. Sun lura da samuwar radicals a wasu kayan shuka da dabbobi. Tun daga 1960s, saboda ci gaba da inganta kayan aiki da ci gaba da haɓaka fasahar fasaha, ana amfani da fasahar resonance electron paramagnetic a kimiyyar lissafi, semiconductor, Organic chemistry, hadaddun sunadarai, sunadarai sunadarai, injiniyan sinadarai, sunadarai na ruwa, masu kara kuzari, ilmin halitta, da kuma ilmin halitta. An yi amfani da shi sosai a fannoni da yawa kamar sunadarai, likitanci, kimiyyar muhalli, da hasashen yanayin ƙasa.