Specification
| AT1120M | AT1120MA | |
| Detection unit (DU) | BDKG-11M | BDKG-05M |
| Processing unit (PU5) | РU5 is a hand-held PC (HPC) with integrated detection module | |
| Detectors | Scintillator, NaI(Tl) Ø63×63 mm (DU); Geiger-Mueller counter tube (PU5) |
Scintillator, NaI(Tl) Ø40×40 mm (DU); Geiger-Mueller counter tube (PU5) |
| Energy range | 20 keV – 7 MeV (DU) 60 keV – 3 MeV (PU5) |
|
| Detectable activity of 137Cs source, located at the distance of 20 cm in a time not longer than 2 s | (30±6) kBq | (50±10) kBq |
| Typical resolution at 662 keV (137Cs) | 7.5% | |
| Measurement range of ambient dose equivalent rate | 0.03 – 150 µSv/h (DU) 1 µSv/h – 100 mSv/h (PU5) |
0.03 – 300 µSv/h (DU) 1 µSv/h – 100 mSv/h (PU5) |
| Limits of tolerable intrinsic relative error | ±20% | |
| Typical sensitivity to 137Cs gamma radiation | 2700 cps/(µSv·h-1) (DU) | 870 cps/(µSv·h-1) (DU) |
| Energy dependence relative to 662 keV (137Cs) | ±15% (50 keV to 7 MeV) (DU) -25% to +35% (60 keV to 3 MeV) (PU5) |
|
| Response time for dose rate change from 0.1 to 1 µSv/h | ≤2 s (DU) | |
| Protection class | IP54 (DU) IP67 (PU5) |
|
| Overall dimensions, weight (assembled with handle) | 355x190x170 mm, 2.65 kg | 330x180x160 mm, 1.85 kg |
