FJ222 X-ray and Gamma Radiation Personal Dosimeter specification:
Detector: GM Counting tube
Detection range: Cumulative dose equivalent:Hp(10) 0.0uSv-99.99mSv
Dose equivalent rate:Hp(10) 0.1uSv/h-99.99mSv/h
relative error: below +/- 15%( 137Cs)
Corresponding energy: 50Kev-1.3Mev, tolerance +/- 30%

Alarm function: FJ222 X-ray and Gamma Radiation Personal Dosimeter is equipped with fixed alarm values of 50usv and 25usv / h. When the alarm value is greater than the set value, there is an audible and visual alarm. When the counter is blocked, the continuous alarm will continue.