AT1103M X-RAY Radiation Dosimeter

Unique highly-sensitive devise for measuring radiation exposure on crystalline lens, mucus membranes and skin.
Measures directed dose equivalent rate of continuous X-ray radiation with energy from 5 keV.

Operating principle
NaI(Tl) ø9x2 mm scintillator with beryllium window is used in the dosimeter as an X-ray detector.
Method of measuring directed dose equivalent rate is based on determining of instrument spectrum and its non-continuous weighing with normalization per dose rate unit. Thus energy dependence is corrected, which is common to pulse counting mode.  

  • Monitoring accepted levels of X-ray radiation with low-energy and intensity from video display units, night vision devices, oscillographs, TV receivers, microwave emitters, ion implanters, search and medical continuous X-ray apparatus
  • Certification testing of instruments and equipment with sources of unused X-ray radiation, protective measures management
  • Dosimetric control during work with 55Fe, 239Pu, 109Cd, 129I, 241Am, 57Co, 139Ce etc. isotopes.

  • Search for X-ray and low-energy gamma radiation sources
  • Quick accommodation to changes in radiation level
  • Sound and visual alarm in case threshold level is exceeded
  • Memory function for 100 measurement results
  • Integrated system for measurement path LED stabilization, so there is no need for check radioactive source
  • Analog-to-digital converter foe 256 channels
  • Measurement results can be written, stored and transmitted into PC using RS 232 interface
  • Dust and splash-proof design
  • Not for natural background measuring
  • Background component correction during measuring

AT1103M X-ray radiation dosimeter has the pattern approval certificates of Republic of Belarus, Russian Federation, Ukraine and Kazakhstan.


Standard dosimeter sensitivity response
upon radiation incidence angle


NaI(TI) Ø9x2 mm with beryllium window

Directional radiation dose equivalent rate measurement range

50 nSv/h...100 µSv/h

Directional radiation dose equivalent measurement range

50 nSv...5 mSv

Limit of intrinsic relative measurement error


Registered X-ray radiation energy range

5 keV...160 keV

Sensitivity for 241Am

400 cps/µSv·h-1

Energy dependence relative to 241Am in the following range:


5 keV...60 keV


60 keV...160 keV


Calibration error for 241Am

±5% max.

Maximum statistical load

6·104 s-1

Detectable 241Am activity at 0.5 m distance for <2 sec

1000 kBq (27 µCi)

Operation mode setup time

≤5 min

Power supply

Internal rechargeable Ni-MH battery or AC power adapter

Continuous run time

≥24 h

Working temperature range


Relative air humidity with temperature ≤35°C without moisture condensation


Protection class


Overall dimensions

233x85x67 mm


0.9 kg

Dosimeter meets International standard requirements: IEC 60846-1:2009
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

Design and specifications are subject to change without notice

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