MAGNITOGRAF (az yun. magnetis — magnit va …graf), asbobest, ki muttasil tagyiryobii maydoni magnitii Zachii (varnasiyai magniti)-ro sabt mekunad. Az varnometrhoi magniti va tajhizoti sabtkunanda (registrator) iborat ast. Magnitograf soddatarin az fotoregnetrator, rushnoidihak va se varnometri optiki-mekhaniki iborat meboshad. Har yak variometr oina dorad. Nuri rushnoi az oina aks gashta, bevosita ba lentai (fotokoraz yo fotoplyonka) barabani sust davrzananda meaftad. Ba lenta tagyiryobii fotojarayonro menavisad. Chunin Magnitograf tagyiryobii maydoni magnitii Zaminro, ki davrahoi az yakchand soniya to yakchand moh ast, bo sahehii 10-13 sabt mekunad. Dar magnitogrammai hosilshuda doir ba vaqt, amplituda va davri variasiyahoi magniti malumotho hast. Ba sifati tajhizoti sabtkunanda basomadsanj, voltmetrhoi raqami, magnitofon, perforator va g-ro istifoda burdan mumkin ast. Nishondodhoi Magnitograf kodonida shuda, dar hisobmoshini elentroni kor karda meshavand.