note: sorry, I do not have Bubble Technology Industries e-mail address to bypass inquiring through RADSAFE. I would appreciate a service representive from Bubble Technology Industries to e-mail me to discuss the BDS-10000, -2500, -1000, -600, -100, -10 dosimeters and the BD-100R (O/F) dosimeters. my e-mail: lrvicker@pantex.com thank you, Lisa