AT1117M Radiation monitor

General control of pollution by radioactive materials in impulse count rate mode

Consisting of:

  • BDPS-02 Smart probe
  • PU Processing unit

Radiation monitor with universal smart probe BDPS-02 is designed to control general level of pollution by radioactive materials in impulse count rate mode. Radiation monitor features separate alpha particles flux density with beta particles flux density, as well as gamma radiation dose rate measurement mode.

Processing unit has a built in Geiger-Muller tube to control gamma radiation dose and dose rate at operator's site.

Operating principle

End window GM tube with detector working area of 14 cm2 and thin end window to detect integral alpha, beta and gamma radiation with this window open. Supplied alpha filters can be used to measure alpha and beta particle flux separately. Compensating filter shall be used at BDPS-02 for dose rate and dose measurement.

BDPS-02 sends data to processing unit to be displayed on a big LCD-screen. Operation algorithm provides measurement continuity and real time statistical processing of measurement results.



Multiple functions
Wide measurement range
Wide energy range
Sound and visual alarm for exceeded threshold levels
Measurement results can be written and stored in non-volatile memory of Radiation monitor
Can be attached to a telescopic bar
Operation in harsh weather conditions


Radiation monitor is listed in national registries of measurement instruments of Republic of Belarus, Russian Federation, Ukraine, Kazakhstan, Uzbekistan, Azerbaijan and Turkmenistan.


Registered radiation



Gamma radiation (γ)


Alpha (α), beta (β), x-ray (Х), gamma (γ) radiation




Geiger-Muller counter tube


Geiger-Muller counter tube, 14 cm2

Impuls count rate measurement range

0.01 ... 1.5·105 s-1

Measurement range of surface alpha particles flux density [BDPS-02]

2.4 ... 1·106 particle/(min·cm2)

Energy range of registered alpha particles [BDPS-02]

4 ... 7 MeV

Measurement range of surface beta particles flux density [BDPS-02]

6 ... 1·106 particle/(min·cm2)

Energy range of registered beta particles [BDPS-02]

155 keV ... 3.5 MeV

Sensitivity [BDPS-02]


- To alpha radiation from 239Pu source

0.015 cps/particles·min-1·cm-2

- To beta radiation from 90Sr + 90Y source

0.12 cps/particles·min-1·cm-2

Measurement range of ambient radiation dose rate equivalent



0.1 µSv/h ... 30 mSv/h


1 µSv/h ... 10 mSv/h

Measurement range of ambient radiation dose equivalent



0.1 µSv ... 1 Sv


1 µSv ... 1 Sv

Registered gamma radiation energy range



20 keV ... 3 MeV


60 keV ... 3 MeV

Sensitivity to gamma radiation from 137Cs



6.6 cps/µSv·h-1


1.0 cps/µSv·h-1

Response time for dose rate measurement



Up to 3 s (for DR≥1 µSv/h)


Up to 2 s (for DR≥10 µSv/h)

Energy dependence relative to 662 keV (137Cs)



±30% (20 keV ... 3 MeV)


–25% ... +35% (60 keV ... 3 MeV)

Limit of intrinsic relative measurement error


Burn-up life

≥100 Sv

Protection rating


Continuous run time

≥24 h

Operation temperature range

-30°С ... +50°С

Overall dimensions, weight



200x85x36 mm, 0.5 kg


138x86x60 mm, 0.3 kg


Internal rechargeable battery

Power supply

External +12 VDC power source


External 230 VAC 50 Hz power source


Design and specifications are subject to change

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