Geiger-Miller counter, ama Geiger counter ee gaaban, waa qalab tirinta loogu talagalay in lagu ogaado xoogga shucaaca ionizing (Alfa particles, beta particles, gamma rays, iyo X-rays).Marka danabka lagu dabaqo baaritaanka uu gaaro xad gaar ah, mid kasta oo ka mid ah ion ay ion ka sameysan tahay raajooyinka tuubada waa la kordhin karaa si ay u soo saaraan garaaca korantada oo isku mid ah waxaana duubaya qalabka elektarooniga ah ee ku xiran, sidaas darteedna lagu cabbiro tirada fallaadhaha halkii kasta. waqtiga halbeegga.