The Geiger coonter is an instrument uised for meisurin ionisin radiation uised widely in sic applications as radiation dosimetry, radiological pertection, experimental pheesics an the nuclear industry.

Geiger–Müller coonter
Geiger counter.jpg
A "twa-piece" bench teep Geiger–Müller counter wi end-window detector
Ither namesGeiger coonter
UisesPairticle detector
InventorHans Geiger
Walther Müller
Relatit itemsGeiger–Müller tube