Self-reading, Quartz fibre pocket dosimeter manufactured by R.A. Stephen. Measures cumulative gamma and x-ray exposure up to 2 Rem. New Old Stock in individually serial-numbered box. nuclear.com will zero before shipping.  If you keep this with you, you can check it periodically to see how...

This is Ion Chamber Model RO-2A, manufactured by Eberline. Serial number 793. It's used, and in very good condition. If you're looking for a professional quality dose rate meter, this is an excellent choice. If I had gotten on a plane to help the folks at Fukushima, I would have taken this along. This...