The Kearny Fallout Meter or KFM is an expedient radiation meter. It is designed such that someone with a normal mechanical ability would be able to construct it before or during a nuclear attack and from common household items.
The Kearny Fallout Meter was designed to utilize static electricity, produced by a hard plastic rubbed on dry paper. The Kearny Fallout Meter was also engineered to be less expensive to build than dosimeters were to purchase, and to be made out of commonly available materials, such that they could be constructed even after a disaster. Learn how to make one for yourself today!
(Picture Credit: orau.org )