AT2331 Emergency Alarm Dosimeter

Detection of self-sustaining chain reaction and generation of alarm signals to evacuate personnel from hazardous area.

AT2331 can be combined with AT2327 Alarm Dosimeter and a personal computer running “SARK.NET” software to create an alarm system for detection of occurrence of self-sustaining chain reaction.


  • Detection of self-sustaining chain reaction in full range of its characteristics
  • High reliability
  • Self-monitoring of component parts
  • Backup power source
  • Logging measurement results into non-volatile memory of alarm dosimeter
  • Integration into external security systems


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AT2331 Emergency Alarm Dosimeter
Scintillation detector Plastic Ø10×5 mm
Minimum duration of the registered self-sustaining chain reaction 1 ms
Measurement range of absorbed dose rate 0.1 µGy/h – 1 Gy/h
Measurement range of absorbed dose 0.05 µGy – 10 Gy
Energy range 60 keV – 3 MeV
Energy dependence relative to 662 keV (137Cs) ±35%
Selectable dose rate threshold range 1 µGy/h – 1 Gy/h
Time interval from the moment of response to the moment when the rated alarm sound level is reached ≤0.5 s
Alarm sound level at 1-meter distance 100 dB
Number of measurement channels Up to 32
Continuous battery operation time ≥6 h

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


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