... absorbed dose rate of relevant national standard. BS9521 X, Y Ray Radiation Dose MeterTechnical Parameters DetectorNaI(Tl)Energy range35keV~3MeVEnergy ... alloy case, small and convenient, suitable for outdoor operation.Application FieldMainly used for safety of sanitation, environment protection, injury ... in various bad circumstances and outdoors. Portable Realtime X Ray, Y Ray Radiation Dose Meter