A Geiger–Müller counter, also called a Geiger counter or dosimeter, is a type of particle detector that measures ionizing radiation. It detects the emission of nuclear radiation — alpha particles, beta particles, and gamma rays — by the ionization produced in a low-pressure gas in a Geiger–Müller tube, which gives its name to the instrument. In wide and prominent use as a hand-held radiation survey instrument, it is perhaps one of the world's best-known radiation instruments.
Where to get one?
- DIY projects for people used to solder and deal with electronics
- lab:pigi produced in munich for 25€ (search for the link 'I want to have it' on the right)