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Etymology

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Named after Hans Geiger who developed the first such device in 1908 together with Ernest Rutherford.

Pronunciation

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Noun

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Geiger counter (plural Geiger counters)

  1. A device designed to detect radioactivity and measure its intensity.
    Synonym: Geiger-Müller counter
    • 1988, David Halliday, Robert Resnick, Fundamentals of Physics, 3rd edition, page 387:
      Figure 27 shows a Geiger counter, used to detect ionizing radiation. The counter consists of a thin central wire, carrying a positive charge, surrounded by a concentric circular conducting cylinder, carrying an equal negative charge.
  2. (by extension, retail) a feature of an RFID reader that emits a sound indicating the signal strength of an RFID tag that is being searched for.
    • 2021 July 15, “10 Facts About the Geiger Counter Functionality, aka RFID Tag Locator”, in atlasRFIDstore[1] (blog), retrieved 23 August 2024:
      Any Geiger Counter feature can direct a user towards an RFID tagged item or at least point the user in the right direction, depending on how far away the RFID tag is.

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