Specification
| AT1321 | |
| Detectors | Scintillation NaI(Tl), Ø25×40 mm; Geiger-Muller counter tube  | 
| Energy range | 20 keV – 3 MeV | 
| Detectable activity of 137Cs source, located at the distance of 15 cm in a time not longer than 2 s | (50±10) kBq | 
| Typical resolution at 662 keV (137Cs) | 8.5% | 
| Measurement range of ambient dose equivalent rate | 30 nSv/h – 100 mSv/h | 
| Limits of tolerable intrinsic relative error | 
±20% | 
| Typical sensitivity to 137Cs gamma radiation | 425 cps/(µSv·h-1) | 
| Energy dependence relative to 662 keV (137Cs) | ±20% (50 keV – 3 MeV) | 
| Response time for dose rate change from 0.1 to 1 µSv/h | <2 s | 
| Protection class | IP54 | 
| Overall dimensions, weight | 145x100x50 mm, 0.7 kg | 



















