How do radon Geiger counters work?

The question whether Geiger counters are actually suitable for detecting radon is debatable. read more

Geiger counters are the most familiar of various ionizing radiation detectors that work in broadly the same way. German physicist Hans Geiger (1882–1945) developed the idea in 1912 while working with Ernest Rutherford, the New-Zealand-born physicist who"split the atom" (proved experimentally that atoms consisted of other, smaller particles). read more

You can look for Geiger counters in Electrical and Test Equipment on eBay. They range from $30 to several hundred. Note that some of these are labeled as Geiger counters but they are really ion chambers, like the CDV-715. read more

A Geiger counter is a metal tube filled with an easily ionized gas. A wire runs down the center of the tube. An electrical charge is applied between the center wire and the tube walls, positive on the central wire. The voltage between the wire and the tube wall is carefully monitored. read more