I have an excess of 0-500 mR pocket ion chamber pen dosimeters,tested, would like to trade them for 0-200 mR. George Dowell GEOelectronics at netscape.com ======= Email scanned by PC Tools - No viruses or spyware found. (Email Guard: 7.0.0.18, Virus/Spyware Database: 6.15300) http://www.pctools.com/ =======