page_title: Civil defense Geiger counters
section_title: US models
hierarchical_section_title: Civil defense Geiger counters / US models
caption_attribution_description: English: Victoreen Civil Defence V-777-1 shelter radiation detection kit overview. It includes, from left to right: V-700, a true Geiger-Mueller counter, with its headphone and detachable tube; V-715, a ionization chamber; two V-742 stylo-dosimeter (portable dosimeter); V-705, a dosimeter reader; operation manual for every component; two adustable straps for V-700 &amp; V-715; several D-cells to power everything (two D-cell for each - V-742 dosimeter do not require battery). Scale is given by the metric scale put around the set. (from Cleveland, Ohio). Italiano: Vista d'insieme degli strumenti per la rilevazione di radiazione: (da sinistra a destrra)contatore geiger V-700, la camera di ionizzazione V-715, il lettore del dosimetro V-705, 2 dosimetri a stilo V-742 e relativi manuali
context_page_description: However, most civil defense devices were ion-chamber radiological survey meters capable of measuring only high levels of radiation that would be present after a major nuclear event.
  Most Geiger and ion-chamber survey meters were issued by governmental civil defense organizations in several countries from the 1950s in the midst of the Cold War in an effort to help prepare citizens for a nuclear attack.
  Many of these same instruments are still in use today by some states, Texas amongst them, under the jurisdiction of the Texas Bureau of Radiation Control. They are regularly maintained, calibrated and deployed to fire depts and other emergency services.
context_section_description: CD Counters came in a variety of different models, each with specific capabilities.  Each of these models has an analog meter from 1 to 5, with 1/10 tick marks.  Thus, at X10, the meter reads from 1 to 50.
  CD meters were produced by a number of different firms under contract. Victoreen, Lionel, Electro Neutronics, Nuclear Measurements, Chatham Electronics, International Pump and Machine Works, Universal Atomics, Anton Electronic Laboratories; Landers, Frary, & Clark; El Tronics, Jordan, and Nuclear Chicago are among the many manufacturers contracted.
  Regardless of producer, most counters exhibit the same basic physical characteristics, albeit with slight variations between some production runs: a yellow case with black knobs and meter bezels. Most US meters had a "CD" sticker on the side of the case.
caption: Victoreen Civil Defence V-777-1 shelter radiation detection kit overview
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