Geiger counter
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A Geiger counter is an electronic instrument for detecting and measuring ionizing radiation with the use of a Geiger–Müller tube. It is widely used in applications such as radiation dosimetry, radiolo
A "two-piece" bench-type Geiger–Müller counter using a cylindrical end-window detector connected to an electronics module with analogue readout
Geiger counter with pancake type probe
Laboratory use of a Geiger counter with end-window probe to measure beta radiation
A modern one-piece Geiger–Müller counter, including Geiger–Müller tube type 70 019 (at the top)
Dosimeter
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A radiation dosimeter is a device that measures the dose uptake of external ionizing radiation. It is worn by the person being monitored when used as a personal dosimeter, and is a record of the radia
Geiger counter
…one of the world's best-known radiation detection instruments. As such, the phrase Geiger counter is often used generically to refer to any form of dosimeter (or, radiation-measuring device), but scientifically, a Geiger counter is only one specific type of dosimeter. The original detection principle was…
Radiation dosimeter in Pripyat
View of readout on an electronic personal dosimeter. The clip is used to attach it to the wearer's clothing.
View of quartz fiber dosimeter reading
Chromoradiometer or colour dosimeter by Guido Holzknecht (1902)