AT1321 Spectrometer

Spectrometric Personal Radiation Detector (SPRD) is a compact instrument for rapid detection of radiation materials and sources with natural, medical, industrial radionuclide identification function.
  • Compact and highly-sensitive to gamma radiation
  • Spectrum analysis and radionuclide identification can be done without PC
  • Internal GPS-module for geo-referencing of measurement data
  • USB and Bluetooth interfaces for connecting to PC
  • At least 700 spectrum files can be stored in detector internal memory
  • Low weight and small size
  • Sound, light and vibration notification
  • Emergency situations on nuclear energy facilities
  • Suppression of unlawful traffic of radioactive sources
  • Monitoring of premises and environment
  • Radiation safety control during work with radioisotopes
  • Radiation monitoring of nuclear industry, oil and gas complex, and other fields
  • Radiopharmaceuticals production and Nuclear medicine
  • Dosimetry survey of ground, radioactive mapping
The radiation detector operation principle is based on constant count rate measurement of gamma radiation impulses by a scintillation detector, data analysis in order to detect gamma-radiation pollution, amplitude spectrum measurement with subsequent automatic processing to receive dose rate value and radionuclide composition data of the relevant gamma radiation source. These data are stored in the non-volatile memory of the detector.
Geiger-Muller counter tube with a filter is used to extend the dose rate measuring range. The filter facilitates smoothing of sensibility energy dependence.
SPRD has internal GPS-module for measurement data geo-referencing and mapping. 


Detection of radiation sources
Measurement of  gamma radiation dose rate and count rate, identification of radionuclides
Continuous measurement of gamma radiation dose rate and count rate
Processing of spectra, identification of radionuclides


Scintillator NaI(Tl), Ø25x40 mm;

Integrated Geiger-Muller counter tube

Energy range

20 keV...3 MeV

Radionuclide identification

Industrial, Natural, Medical

Individual order:

Library of identified radionuclides can be corrected

Typical resolution at 662 keV (137Cs)


Detection time of 137Cs source with 50 kBq activity from 15 cm distance

2 s

Measurement range of ambient radiation dose rate equivalent


NaI(TI) detector

0.03 μSv/h...300 μSv/h

Geiger-Muller counter tube

10 μSv/h...100 mSv/h

Sensitivity of NaI(TI) detector to gamma radiation



4700 cps/μSv·h-1


425 cps/μSv·h-1


210 cps/μSv·h-1

Intrinsic relative error of gamma radiation dose rate measurement

±20% max.

Energy dependence relative to 662 keV (137Cs)


NaI(TI) detector

±20% (in 50 keV...3 MeV energy range)

Geiger-Muller counter tube

-25%...+45% (in 60 keV...3 MeV energy range)

Number of ADC channels


Continuous run time

14 h

Protection class


Working temperature range


Relative air humidity with temperature ≤35°C without condensation


Overall dimensions

145x100x50 mm


0.7 kg

AT1321 Spectrometer meets International standard requirements: IEC 62327:2006;
Safety standard requirements: IEC 61010-1:1990;

EMC requirements: EN 55022:1998+А1:2000+А2:2003, EN 55024:1998+A1:2001+A2:2003,

IEC 61000-4-2:2001, IEC 61000-4-3:2008.


AT1321 Spectrometer meets the NSS1 requirements (IAEA).

Design and specifications are subject to change without notice

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