AT3509, AT3509A, AT3509B and AT3509C Personal Dosimeters

Pocket-size wide-range intelligent devices, ideally matching accuracy, functionality, user friendliness, reliability and price.
Dosimeter with reader, which is connected to PC, and software suite make an efficient automatic system for staff radiation exposure monitoring.

Operating principle

Primary dosimeter function is to measure Hp(10), Hp(0.07) individual dose equivalent, and the secondary one is to measure Hp(10), Hp(0.07) dose rate of continuous X-ray and gamma radiation.
Dosimeters provide dose range measurement in 7.5-order range and have individual sound and LED alarm function.
Microprocessor operation mode management, data processing, display on TFT screen and self-check function.
Accumulated dose data and dose accumulation history is saved in non-volatile memory when the device is powered off.






Dose Нp(10)

continuous x & γ



Dose rate p(10)

continuous x & γ



Dose Hp(0,07)

continuous x & γ


Dose rate p(0,07)

continuous x & γ



  • Radiation protective measures in case of nuclear disasters
  • Roentgenology
  • Therapeutic radiology
  • Nuclear medicine
  • Electronics (Ion implanters)
  • Accelerating installations
  • Nuclear research activities
  • X-ray Crystallography and X-ray Fluorescence Spectroscopy, electronic microscopy

  • Silicone planar detector
  • Zero intrinsic background
  • Simultaneous measurement of visceral radiation exposure Hp(10) and skin radiation exposure Hp(0.07) - AT3509B and AT3509C in wide range of dose rates
  • Compensating filter and electrical energy dependence correction
  • Resistance to impacts and vibration, dust-and-moisture-proof, tolerance to electromagnetic interference
  • Repeating impact protection (so called "Microphone effect")
  • Parameter self-check
  • Can be integrated into a system or used separately
  • Low weight and small size
  • Calibrated with water phantom ISO 30x30x15 cm
  • Dosimeter-to-PC communication via IR-transmitter in reader 
The personal dosimeters have the pattern approval certificates of Republic of Belarus, Russian Federation, Ukraine, Kazakhstan and Lithuania.

Typical dependences

Standard energy sensitivity relationship
respect to 137Cs gamma radiation
energy of 662 keV (AT3509B)
Standard dosimeter anisotropy
for vertical position on the phantom (AT3509)
1 – 241Am; 2 – 137Cs; 3 – 60Co

Individual dose equivalent measurement range


AT3509, AT3509A Hp(10)

1 µSv...10 Sv

AT3509B Hp(10), Hp(0.07)

1 µSv...10 Sv

AT3509C Hp(10), Hp(0.07)

1 µSv...10 Sv

Individual dose rate equivalent measurement range


AT3509, AT3509A Ḣp(10)

0.1 µSv/h...1 Sv/h

AT3509B Ḣp(10), Ḣp(0.07)

0.1 µSv/h...1 Sv/h

AT3509C Ḣp(10), Ḣp(0.07)

0.1 µSv/h...5 Sv/h

Intrinsic relative error of dose measurement without associated beta radiation

±15% max.

Intrinsic relative error of dose rate measurement


0.1 µSv/h...1 µSv/h

±30% max.

1 µSv/h...1 Sv/h

±15% max.

1 Sv/h...5 Sv/h (AT3509C)

±(15+0.001p)% max.,

where p is dose rate in mSv/h

Calibration error for 137Cs


Energy range


AT3509, AT3509B,C

15 keV...10 MeV


30 keV...10 MeV

Energy dependence relative to 662 keV (137Cs)


Hp(10) in the following energy range:


15 keV...1.5 MeV


1.5 MeV...10 MeV


Hp(0.07) in the following energy range (AT3509B,C):


15 keV...300 keV


Alarm thresholds

1 of 8 independent dose thresholds, 1 of 8 independent dose rate thresholds

Anisotropy in angular spacing ±60°


For 137Cs and 60Co


For 241Am


Response time for dose rate measurement (When dose rate is greater than 10 µSv/h)

5 s

Radiation overloading

≤10 Sv/h


2 x AAA type batteries; rechargeable cells can be used

Continuous run time

≥500 h

Working temperature range


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


Drop protection

From ≤1.5 m to hard surface

Protection class


Connection to PC

USB (via Reader)

Overall dimensions

105x58x23 mm


100 g

The personal dosimeters meet International standard requirements: IEC 61526:2005
(confirmed by tests IAEA-EURADOS, IAEA-TECDOC-1564)
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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