AT6101DR Spectrometer (Stationary version)


This version of AT6101DR Multifunction portable spectrometer can be used for identification of radionuclides and specific activity measurement of 137Cs, 134Cs, 131I and 40K radionuclides in liquid radiation wastes, water, etc.
No sampling needed for all measurements.
This spectrometer can also be used for in situ measurement of gamma radiation ambient dose equivalent rate.

Operating principle

The detection device sealed inside a shock-resistant, dust-and-moisture-proof container registers gamma radiation of controlled radionuclides. Spectrometric data from the detection device is sent via special cable to a Desktop PC and displayed on its screen.
Handheld PC or Tablet PC can be used instead of Desktop PC. In this case replace the USB adapter on the cable spool by Bluetooth adapter.

Instrumental spectra processing algorithm in PC software allows radioisotope composition data displaying in the form of specific activity of certain radionuclides or their concentration, specific effective activity of natural radionuclides.
The value of gamma radiation ambient dose equivalent rate in inspection point is determined by means of instrument spectrum analysis with "spectrum-dose" operational function.


▪ Radioactive waste monitoring
▪ Nuclear medicine
▪ Radiopharmacy
▪ Radioecology


▪ Available measuring geometries: 4π
▪ Instant detection of near background dose rate level increase
▪ Automatic LED stabilisation and measurement path temperature compensation
▪ Setting up procedure and parameter check using check sample that contains KCl salt with naturally occurring radionuclide 40K
▪ Expert mode for detailed instrument spectrum analysis with automatic sample radionuclide content identification
▪ All measurement data can be further processed by dedicated GARM software
▪ Editing of measurement results: Bq/kg (134Cs, 137Cs, 131I, 40K)
▪ Wireless communication between Bluetooth adapter and HPC (Tablet PC) at distances up to 10 m


"ATDR mobile" Software, Main operation modes (HPC)

"ATDR mobile" Software, Main operation modes (Tablet PC)


Gamma radiation detector

cintillation NaI(Tl) Ø63x63 mm

Energy range

50 keV – 3 MeV

Specific activity measurement range for 4π measurement geometry:


134Cs and 137Cs

50 – 106 Bq/kg


30 – 106 Bq/kg


50 – 104 Bq/kg

Limit of activity intrinsic relative measurement error


Typical resolution at 662 keV (137Cs)


Maximum input statistical load

≥5·104 sec-1

Number of ADC channels


Measurement range of ambient dose equivalent rate

0.01 – 130 µSv/h

Limit of ambient dose equivalent rate measurement intrinsic relative error



Sensitivity to gamma radiation of



11600 cps/µSv·h-1


2200 cps/µSv·h-1


1200 cps/µSv·h-1

Response time for dose rate measurement is from 0.1 to 1 µSv/h.

<2 s

Integral nonlinearity


Initialisation time

1 min

Continuous run time in normal conditions

≥9 h

Measurement instability during continuous operation


Burn-up life

≥100 Sv

Protection rating


PC interface


Operation temperature range

From -20оС to +50оС

Relative humidity with air temperature ≤35°С without condensation


Overall dimensions, weight


Detection unit

Ø130x500 mm, 4.5 kg


100x185x45 mm, 0.5 kg

Tablet PC

144x242x40 mm, 1.1 kg

АТ6101DR Spectrometer conforms to safety standards of IEC 61010-1:2001, and EMC compatibility requirements: EN 55011:2009, IEC 61000-4-2:2008, IEC 61000-4-3:2008, IEC 61000-4-4:2004, IEC 61000-4-5:2005, IEC 61000-4-6:2008.

The Spectrometer is listed in registries of measurement instruments of Republic of Belarus, Russian Federation, Kazakhstan, Uzbekistan and Azerbaijan.

Design and specifications are subject to change

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