Geiger-Miller counter, ko Geiger counter a takaice, kayan aiki ne da aka ƙera don gano ƙarfin ionizing radiation (alpha particles, beta particles, gamma rays, da X-rays).Lokacin da ƙarfin lantarkin da aka yi amfani da shi a kan binciken ya kai wani yanki, kowane nau'i na ion da aka yi amfani da su ta hanyar ray a cikin bututu za a iya ƙarawa don samar da bugun jini mai girman girman da na'urar lantarki da aka haɗa, ta haka ne a auna adadin haskoki. lokacin naúrar.