Geiger Counters

Geiger counters can identify radioactive emissions, typically beta particles and gamma rays, and can be used to quantify the radiation a material releases or the radiation absorbed by a human or animal.

A Geiger counter has a tube filled with an inert gas that conducts electricity when it is struck by a high-energy particle. When a significant amount of radiation is detected, a Geiger counter will generate a click as an indicator.