AT1320, AT1320A, AT1320B Gamma Activity Monitors

Highly sensitive scintillation gamma activity monitors of spectrometric type are designed for measuring volumetric (specific) activity of 131I, 134Cs, 137Cs, 40K, 226Ra, 232Th radionuclides in samples.

 


Operating principle

Model

Сontrolled radionuclides

Measuring vessels

АТ1320

137Сs, 40К, 226Ra, 232Th

1 l, 0.5 l, 0.1 l

АТ1320А

137Сs, 40К

1 l, 0.5 l, 0.1 l

АТ1320А

(with extended radionuclide library)

131I, 134Cs, 137Cs, 40K

1 l, 0.5 l, 0.1 l

АТ1320В

137Сs, 40К

1 l, 0.5 l, 0.1 l,

10 l (without protection unit lid)

 

Operating principle is based on analysis of pulse-height distribution from detection unit. Energy distribution parameters are processed in energy windows according to matrix method. Matrix method allows measurement of volumetric (specific) activity for monitored radionuclides based on energy windows count rate. Measurement results are displayed on Information processing unit (PU) screen in real time. Detection units of gamma activity monitors can be connected to PC*.


 

Application software replaces Information processing unit functions and is used for controlling radioactivity monitor modes, measurement data display, spectra processing, electronic history logging and recording of measurement results.



APPLICATIONS

  • Radiation protective measures in case of nuclear disasters
  • Potable water monitoring
  • Foodstuffs monitoring
  • Agricultural products monitoring
  • Mineral raw materials, construction materials, wood products monitoring
  • Product, raw material and waste monitoring in mining and oil industry
  • Radioactive waste and effluent monitoring in nuclear industry


FEATURES

  • Smart spectrometric probe
  • Internal continuous automatic LED stabilisation of gamma counter energy scale, calibration integrity monitoring and automatic calibration with integrated KСl sample
  • Memory function and automatic background subtraction
  • "Energy Windows" algorithm is used for instrument spectrum processing
  • Recording and storing in memory up to 300 measured spectra
  • 20-second radiation control of mushrooms and berries in 10-litre packing box
  • PC with dedicated software can be used instead of data processing unit to provide documentation function
  • Methodological support of measurements

Gamma Activity Monitors have the pattern approval certificates of Republic of Belarus, Russian Federation, Ukraine, Kazakhstan and Turkmenistan.


* The Customer shall purchase a PC and a printer individually or use already available equipment (Minimum technical requirements to PC shall be agreed with the Manufacturer).

Features

Select radionuclides to be detected
Display operational background spectrum
Radioactivity results of the selected radionuclides

Model

Сontrolled radionuclides

Measuring vessels

АТ1320

137Сs, 40К, 226Ra, 232Th

1 l, 0.5 l, 0.1 l

АТ1320А

137Сs, 40К

1 l, 0.5 l, 0.1 l

АТ1320А

(with extended radionuclide library)

131I, 134Cs, 137Cs, 40K

1 l, 0.5 l, 0.1 l

АТ1320В

137Сs, 40К

1 l, 0.5 l, 0.1 l,

10 l (without protection unit lid)

                       

Detector

Scintillation NaI(Tl), Ø63x63 mm

Volumetric (specific) activity measuring range

 

          137Cs

3.7...1·106 Bq/l (Bq/kg)

          134Cs

3...1·105 Bq/l (Bq/kg)

          131I

3...4·105 Bq/l (Bq/kg)

           40K

50...2·104 Bq/l (Bq/kg)

          226Ra

10...1·104 Bq/l (Bq/kg)

          232Th

10...1·104 Bq/l (Bq/kg)

Intrinsic relative error of volumetric (specific) activity measurement with
confidence probability P=0.95

±20% max.

Measured sample density range

0.1...3 g/cm3

Minimum measured volumetric activity of 137Cs radionuclide
in potable water for Marinelli beaker geometry during 1-hour
measurement with ±50% statistical error (
Р=0.95)

5.7 Bq/l

Energy range of measured gamma radiation

50 keV...3 MeV

Number of ADC channels

512

Integral nonlinearity

±1% max.

Intrinsic background for 137Cs window

<2 cps

Typical resolution at 662 keV (137Cs)

8%

Operation mode setup time

10 min

Continuous run time

≥24 h

Measurement instability during continuous service

±3% max.

Working temperature range

0°С...+40°С

Relative humidity with air temperature 30°С without condensation

75%

Power supply

230 V (+23 V/-35 V), 50±1 Hz

Power consumption

≤8 VA

Measurement vessels

 

     Marinelli beaker

1 litre

     Flat vessel

0.5 litre and 0.1 litre

     Plastic box, 380x280x100 mm

10 litre

Overall dimensions, weight

 

     Detection unit

ø97x350 mm, 2 kg

     Processing unit

200x106x35 mm, 0.62 kg

     Protection unit

ø600x700 mm, 125 kg

     Mains adapter

92x62x52 mm, 1 kg

Gamma Activity Monitors meet International standard requirements: IEC 61563:2001;

Safety standard requirements: IEC 61010-1:1990;

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

IEC 61000-4-2:2001, IEC 61000-4-3:2008, IEC 61000-4-4:2004, IEC 61000-4-11:2004

Design and specifications are subject to change without notice

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