By shaking the unit, the plastic beads are given a static charge that causes them to rise up and attach to the inside of the cylinder. Exposure to radiation ionizes the air inside the device and this reduces the charge on the beads. When they lose their charge, the beads slide down the wall to the bottom of the cylinder. The faster this occurs, the higher the radiation levels. It seems to be in very good condition for the age.
It does not come with anything other than the detector pictured. There is no box and no paperwork included.
See pictures for actual physical condition. He states that it still seems to do as advertised. He shook it and the beads stayed suspended... He believes there was no fallout at the time of trying it. Grab up a piece of history and a conversation piece for years to come.
The item "Rare Antique Nu-Klear Fallout Radiation Detector Made by Minutemen Industries" is in sale since Monday, August 31, 2020. This item is in the category "Collectibles\Science & Medicine (1930-Now)\Scientific Instruments\Other Vintage Science Equip". The seller is "savsontrucks" and is located in Hoagland, Indiana. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay, Ukraine.