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It's pretty simple, actually. You use it and it tells you how many rads you have. As long as you keep your rad count under 100, you should be fine. Go above 100 and you're in some trouble. The worst part is you won't even know you've been sucking up rads until a few days later. Get over 1000 and you're cooked - unless you get a hold of a whole lot of Rad-Away.Jake

The Geiger counter is a Wattz Electronics C-Radz model Geiger counter. It detects the presence and strength of radiation fields.


Main article: Geiger counter

A simple device manufactured by Wattz Electronics to detect the presence and strength of radiation fields, such as gamma radiation.[1] Includes a carrying handle and a modern, durable shell for increased portability and ease of use.[2] It's battery life is displayed in the Interface bar's ammo meter.



There is another one in the 3rd level of the Glow in the locker room to the left of the elevator.[clarification needed]

Fallout 2

One can be found in Vault City, in the lockers on the 3rd floor of Vault 8. There is also a Geiger counter in an easy-to-lockpick locker in the greeting office at the entrance of the city. The door is locked, so lockpicking is needed to access it. There is also a variety of valuable loot there, too. Another can be found on a bench in the basement of New Reno Arms.


In Fallout 3, Fallout: New Vegas, Fallout 4 and Fallout 76, it is shown that the Pip-Boy 3000, the Pimp-Boy 3 Billion, the Pip-Boy 3000 Mark IV and the Pip-Boy 2000 Mark VI have a built-in Geiger counter.


  1. Fallout 2 Official Strategies & Secrets: p. 80: "The Geiger Counter is just the thing when you're not sure if the area you're in will make you glow in the dark. Activate the Geiger Counter by placing it into one of your active slots (hands) to see if you're being cooked by gamma radiation, which makes it easier to know when to pop a few Rad-X."
  2. Fallout and Fallout 2 item description: "{5200}{}{Geiger Counter}"
    "{5201}{}{A Wattz Electronics C-Radz model Geiger Counter. Detects the presence and strength of radiation fields.}"
    (PRO ITEM.MSG (Fallout), PRO ITEM.MSG (Fallout 2))