Pedestrian Radiation Monitors (based on AT2327 Alarm Dosimeter)

Detection of gamma and neutron radiation sources in a stream of people crossing borders of controlled facilities.


  • Rapid accommodation to changes in radiation background
  • Sound and light alarm
  • Multiple pedestrian radiation monitors (up to 32) can be joined into a network controlled by application software running on a PC
  • High reliability and self-check function
  • Backup power source


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Pedestrian Radiation Monitors
False alarm rate ≤1 for 8 h of continuous operation
PC interface RS485
Continuous battery operation time ≥6 h
Protection class IP65
Overall dimensions, weight depending on configuration


Gamma radiation detection unit BDKG-19 BDKG-35 BDRM-05
Scintillation detector NaI(Tl) Ø63×160 mm Plastic Ø70×150 mm Plastic 1000x 100×50 mm
Energy range 50 keV – 3 MeV 20 keV – 3 MeV 50 keV – 3 MeV
Typical sensitivity to gamma radiation, cps/(µSv·h-1) 7070 [241Am]
4430 [137Cs]
2340 [60Co]
10000 [241Am]
3200 [137Cs]
1600 [60Co]
60000 [241Am]
31500 [137Cs]
16500 [60Co]
Detection threshold for unshielded source at 1 m height under natural radiation background conditions not more than 0.1 µSv/h (Distance to source 1 m, source travel speed 5 km/h, probability of source detection 80 % under confidence level Р=0.95)
One detection unit 17 MBq [241Am]
260 kBq [137Cs]
120 kBq [60Co]
12.3 MBq [241Am]
300 kBq [137Cs]
150 kBq [60Co]
650 kBq [241Am]
70 kBq [137Cs]
35 kBq [60Co]
Two detection units 11.6 MBq [241Am]
180 kBq [137Cs]
95 kBq [60Co]
8.4 MBq [241Am]
210 kBq [137Cs]
110 kBq [60Co]
450 kBq [241Am]
50 kBq [137Cs]
25 kBq [60Co]


Neutron radiation detection unit BDKN-01 BDKN-05
Detector: 3He proportional counter in polyethylene moderator One 3He counter Two 3He counters
Energy range 0.025 eV – 14 MeV 0.025 eV – 14 MeV
Typical sensitivity to source radiation at the distance of 1 m, cps/(neutron·s-1·cm-2) 1.3 [252Cf] 20 [252Cf]
Source detection threshold at 1 m height (Distance to source 1 m, source travel speed 5 km/h, probability of source detection 90% (50%*) under confidence level Р=0.95), neutron∙s1
One detection unit 3.0·105 [252Cf]
(1.65·105 [252Cf])*
3.1·104 [252Cf]
(1.9·104 [252Cf])*
Two detection units 2.0·104 [252Cf]
(1.35·104 [252Cf])*

Design and specifications are subject to change without notice.
For details please refer to the datasheet.


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