GM-10 Radiation Detector 1.3 Description:
A geiger counter works by detecting the ionization produced by a radioactive particle. Each time a particle of radiation is detected, the counter records this event.The number of events recorded over a period of time indicates the amount of radiation present. Often this is done over one minute intervals, resulting in the familiar "counts per minute" or CPM. The higher the CPM, the higher the radiation levels. The difference between the GM-10 and GM-45 is the size of the radiation sensor. The GM-45 sensor has 24 times the surface area of that in the GM-10 making it more sensitive, especially for alpha and beta radiation sources. That means that it can detect weaker levels of radiation.