I found these in one of my catalogs today.
I know, the specs are probably all wrong, but I did think of our TSA friends when I saw it.
No radiation guesswork! Advanced duo of direct reading Pen Dosimeters accurately read, at any time, accumulated dose (quantity of gamma and x-ray exposure in roentgen units).
Sealed Dosimeter Pens are 4 3/8"l., designed to satisfy military specs. Sturdy metal pocket clip. Charging Station has an adjustment dial on a 4 x 4 x 1 7/8" metal case.
Condition: brand new, never issued. Be safe, order ONLINE now!