Sensor Radiation Detector CsI(Tl) scintillation detector Dose Range Hp(10): 0.01 µSv to 10 Sv (1 μrem to 1000 rem) Dose Rate Range Hp(10): 0.01 µSv/h to 2 mSv/h (1 μrem/h to 0.2 rem/h) Dose Accuracy ±0.1 μSv(±10 μrem) or ±15%, whichever is greater (for 137Cs) Energy Response X- and gamma: from 50 keV to 3 MeV Recommended Valid Calibration Period: 2 years