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2. Geiger counter - Wikipedia

   en.wikipedia.org/wiki/Geiger_counter

   A Geiger counter (/ ˈ ɡ aɪ ɡ ər /, GY-gər; [1] also known as a Geiger–Müller counter or G-M 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, radiological protection, experimental physics and the ...

3. Geiger–Müller tube - Wikipedia

   en.wikipedia.org/wiki/Geiger–Müller_tube

   The Geiger–Müller tube or G–M tube is the sensing element of the Geiger counter instrument used for the detection of ionizing radiation. It is named after Hans Geiger , who invented the principle in 1908, [ 1 ] and Walther Müller , who collaborated with Geiger in developing the technique further in 1928 to produce a practical tube that ...

4. Civil defense Geiger counters - Wikipedia

   en.wikipedia.org/wiki/Civil_defense_Geiger_counters

   The CD V-700 is a Geiger counter employing a probe equipped with a Geiger–Müller tube manufactured by several companies under contract to US federal civil defense agencies in the 1950s and 1960s. This unit is quite sensitive and can be used to measure low levels of gamma radiation and detect beta radiation. In cases of high-radiation fields ...

5. File:A complete Geiger counter, with the Geiger-Muller tube ...

   en.wikipedia.org/wiki/File:A_complete_Geiger...

   English: This is a complete Geiger counter, on the left side you see the keyboard, in the middle the circuit board and on the right the build-in Geiger-Muller tube 70 019 (on top) and the battery compartment for 2 AA batteries

6. CD V-700 - Wikipedia

   en.wikipedia.org/wiki/CD_V-700

   The CD V-700 (often written as "CDV-700") is a Geiger counter employing a probe equipped with a Geiger–Müller tube, manufactured by several companies under contract to United States federal civil defense agencies in the 1950s and 1960s. While all models adhere to a similar size, shape, coloring and form-factor, there were substantial ...

7. Survey meter - Wikipedia

   en.wikipedia.org/wiki/Survey_meter

   Likewise for a beta/gamma geiger instrument, the beta may have an effect at a range in the order of metres, depending on the energy of the beta, which may give rise to the false assumption that only gamma is being detected, but if a sliding shield type detector is used, the beta can be shielded out manually, leaving only the gamma reading.