Iyo Geiger-Miller counter, kana Geiger counter kwenguva pfupi, chiridzwa chekuverenga chakagadzirirwa kuona kusimba kwemwaranzi yeionizing (alpha particles, beta particles, gamma rays, uye X-rays).Kana magetsi akaiswa kuprobe asvika pane imwe siyana, maion ega ega anonatswa nemwaranzi muchubhu anogona kukwidziridzwa kuti abudise simba remagetsi resaizi imwe chete uye richirekodhwa nemudziyo wakabatana wemagetsi, zvichiyera huwandu hwemwaranzi pa nguva yeyuniti.