14 Février 2012
February 14, 2012
Three kinds of ultra-small radiation integrative dosimeters developed by AIST are pictured together with an adapter, front, and a 500-yen coin, left, that illustrates their small size, in this recent photograph. (Mainichi)
TSUKUBA, Ibaraki -- A research institute based here has announced its success in developing an ultra-small integrative and high-quality radiation dosimeter that is no bigger than the size of a memory card, it has been learned.
The National Institute of Advanced Industrial Science and Technology (AIST) in the Ibaraki Prefecture city of Tsukuba has developed three versions of ultra-small dosimeters that are capable of measuring emission doses while at the same time recording past data.
The smallest among the three, which at a glance looks no different from an SD memory card, weighs only 10 grams and is 35 millimeters long, 25 millimeters wide, and 12 millimeters thick.
According to officials at the institute, this is the world's smallest integrative dosimeter capable of storing past data.
The newly-developed devices are made of solid silicon and can be used for a total of six consecutive months on regular watch batteries, institute officials say.
When connected to a computer via a specialized adapter, users can check previously taken data by the exact day and time it was recorded.
The devices also notify users of high radiation doses through a buzzer and a light signal.
The institute is currently looking for a manufacturer to develop the devices into a marketing product that will be targeted at individual consumers and the dosimeter and the adapter will be priced at or under 5,000 yen each, officials say.