Portable high-sensitivity Radiation Monitors which is designed to search for and detect sources of gamma radiation, measure ambient gamma radiation dose equivalent rate, alpha and beta particle flux density from flat contaminated surfaces, as well as for radiometric monitoring of radionuclides in samples using 0.5-litre Marinelli beaker.
For radiometric radionuclide content monitoring in samples the following Monitor design variants are possible:
1) 137Cs monitoring (standard)
2) 137Cs and 134Cs + 137Cs monitoring
3) 131I, 137Cs and 134Cs + 137Cs monitoring
Productspecifications
Detector | |
АТ1125 | Scintillator NaI(Tl) Ø25x40mm |
АТ1125A | Scintillator NaI(Tl) Ø25x40mm, Integrated Geiger-Muller counter tube |
BDPS-02 | End-type Geiger-Muller counter tube |
Ambient gamma and X radiation dose rate equivalent measurement range | |
АТ1125 | 30nSv/h … 300µSv/h |
АТ1125A | 30µSv/h … 100mSv/h |
BDPS-02 | 0.1µSv/h … 30mSv/h |
Ambient gamma and X radiation dose equivalent measurement range | |
АТ1125 | 10nSv … 10mSv |
АТ1125A | 10nSv … 10Sv |
BDPS-02 | 0.1µSv … 1Sv |
Intrinsic relative error limit of dose rate and dose measurement | |
АТ1125, АТ1125А | ±15% |
BDPS-02 | ±20% |
Energy range of registered X-ray and gamma radiation | |
АТ1125, АТ1125А | 50keV … 3MeV |
BDPS-02 | 20keV … 3MeV |
Energy dependence of sensibility | |
Energy range from 50keV to 3MeV | ±15% |
Energy range from 20keV to 3MeV (BDPS-02) | ±20% |
Flux density measurement range | |
Alpha particles (BDPS-02) | 2.4 … 1·106 particle/(min·cm2) |
Beta particles (BDPS-02) | 6 … 1·106 particle/(min·cm2) |
Maximum energy range of detected beta particles spectrum | |
BDPS-02 | 155keV … 3.54MeV |
Sensitivity | |
АТ1125, АТ1125А | |
to 137Cs gamma radiation | 350 cps/µSv·h-1 |
to 241Am gamma radiation | 3800 cps/µSv·h-1 |
BDPS-02 | |
to 137Cs gamma radiation | 6.6 cps/µSv·h-1 |
Radionuclide specific activity measurement range using 0.5 litre Marinelli beaker | |
With Protection Unit | 50 … 105Bq/kg |
W/o Protection Unit | 100 … 105 Bq/kg |
Intrinsic error of radionuclide specific activity measurement | ± 20 % |
Count rate measurement range | 1 … 105s-1 |
Natural radiation gamma background (0.1µSv/h) measurement time with ±20% statistical error (Р=0.95) | <15s |
Detection time of 137Cs source with 10 kBq activity at 5 cm distance | <2s |
Power supply | Internal rechargeable Ni-MH battery or AC power adapter.The accumulator unit is charged from: a) AC mains, (230 ± 23) V, (50 ± 1.0) Hz; b) external DC supply, voltage 12 (+2.0; −1.5) V and output current not less than 1.0 A. |
Operation mode setup time | 1min |
Protection class | |
AT1125 | IP54 |
BDPS-02 | IP65 |
Working temperature range | -20°C…+50°C |
Relative humidity with air temperature ≤35оС without сondensation | ≤90% |
Overall dimensions, weight | |
AT1125, AT1125A | 258×85х67 mm, 1.0 kg |
BDPS-02 | 138x86x60 mm, 0.3 kg |
Protection unit | Ø150×155 mm, 10.5 kg |
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