What is a dangerous CPM?
What is a dangerous CPM? A CPM reading of at least 100 is considered a warning level by the Radiation Network, although the length of time you're exposed to the radiation is an important factor. For instance, it would only take four days to increase your rate to those odds if you're exposed to a level of 10,000 CPM. What does CPM mean on a Geiger counter? Counts per minute Counts per minute (abbreviated to cpm) is a measure of the detection rate of ionization events per minute. Counts are only manifested in the reading of the measuring instrument, and...