Detecting Unit of Gamma Radiation
BDBG-15S is designed to measure ambient dose equivalent rate of gamma radiation in a wide range of values. Suitable for unmanned aerial vehicles, mobile robotic devices, and automated systems of radiation monitoring.
BDBG-15S is available in three modifications: BDBG-15S-09, BDBG-15S-23, and BDBG-15S-90, which differ in size and sensitivity of scintillation detector.
Measurement of ambient dose equivalent rate (DER) of gamma radiation
Scintillation CsI (Tl) detector with a photomultiplier for measurements in the 0.01 μSv/h to 50 μSv/h range (spectrum-dose function):
– 9 cm3 for BDBG-15S-09
– 23 cm3 for BDBG-15S-23
– 90 cm3 for BDBG-15S-90
Energy-compensated Geiger-Muller counter for measurements in the 50 μSv/h to 1 Sv/h range
High sensitivity regardless of minimum weight and dimensions
Ability to extend a measurement range up to 5 Sv/h (at request)
Availability of amplitude spectrum (1 024 channels)
High mechanical immunity
No microphone effect
| BDBG-15S-09 | BDBG-15S-23 | BDBG-15S-90 | |
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0.01 … 150 μSv/h | |
| Main relative permissible error limit of gamma radiation DER measurement at 137Cs calibration with confidence probability of 0.95, not more | 15 % | ||
| Scintillation detector sensitivity to 137Cs per 1 μSv/h, not less | 200 cps | 480 cps | 1500 cps |
| Energy range of registered gamma radiation | 0.05 … 3 MeV | ||
| Energy dependence of measurement results of the detecting unit at gamma radiation DER measurement in the energy range of 0.05 MeV to 1.25 MeV | ± 25 % | ||
| Operating supply voltage range of the detecting unit from external regulated power supply | 7 … 32 V | ||
| Useful current of the detecting unit for overall range of measured gamma radiation DER, not more | 30 mА | 30 mА | 20 mА |
| Time of operating mode setting and measurement time of the detecting unit, not more | 1 min | ||
| Unstable readings of the detecting unit during 24-hour continuous operation, not more | 5 % | ||
| Complementary permissible error limit at measurement caused by ambient temperature change from minus 30 оС to +50 оС | 2 % per each 10 оС deviation from 20 оС | ||
| Interface | RS-485 or UART (Rx, Tx-3.3 V) | ||
| Operating temperature range | – 30 … + 50 оС | ||
| Dimensions of the detecting unit, not more | 103 × 57 × 29 mm | 140 × 70 × 38 mm | 140 × 80 × 50 mm |
| Weight of the detecting unit without fastening elements, not more | 0.25 kg | 0.42 kg | 0.76 kg |
