K8 Personal Nuke Safeguard   Size & weight: 1” x 1.5” x 0.475”; 1/2oz (25mm x 39mm x 12mm; 13g) Detection of Dirty Bombs & other sources of radiation Meets NCRP guidance & recommendation for Management of Terrorist Events Capable of detecting very small amounts of radioactive materials Capable of detecting low level of radiation Detects: X, Gamma & Beta High performance; tested by using NIST traceable sources More info (.pdf) Personal Dosimeter   Size & weight: 48 mm x 70 mm x 17 mm.; 77 grams Detection range from 20 keV to 10 MeV Accuracy ±10% for Cs-137 3-digit LCD display in mrem or µSv unit Dose display and alarm: 0-999 mrem (0-999 mSv) Dose rate display and alarm: 0-999 mrem/hr (0-999 mSv/hr) Display increment in 1 mrem (1 µSv) 1000 programmable intervals of dose history Uses one 1.5 volts AA size alkaline battery   mrem specs µSv specs