Monitores de Actividad Gamma AT1320, AT1320A y AT1320B

AT1320Highly sensitive selective wide-range spectrometric scintillation gamma activity monitor is intended to measure the following parameters:
     - Measuring 137Cs radionuclide volumetric and specific activity in environmental objects
     - Measuring specific effective activity of 40К, 226Ra, 232Th in construction materials






Operating principle

Gamma counters operating principle is based on detection unit pulse-height distribution analysis.
Energy distribution parameters are processed in energy windows with the help of matrix method.
Matrix method is used for converting the window count rate into volumetric (specific) activity.
Measurement results are displayed on Information processing unit screen in real-time.  


  • 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 smelting, mining and oil industry
  • Radioactive waste and effluent monitoring in nuclear industry


  • Smart spectrometric probe
  • Internal continuous automatic LED stabilisation of gamma counter energy scale, calibration integrity monitoring and automatic calibration with integrated KCl 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 and for expanding of monitored radionuclides library
  • Methodological support of measurements


Instrument Radionuclides to control Measuring vessels
AT1320 137 Cs, 40 K, 226 Ra, 232 Th 1 l, 0.5 l, 0.1 l
AT1320A 137 Cs, 40 K 1 l, 0.5 l, 0.1 l
AT1320B 137 Cs, 40 K 1 l, 0.5 l, 0.1 l,
10 l (withount protection unit lid)

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


Detector Scintillator, NaI(Tl) Ø63x63 mm
Volumetric (specific) activity measuring range  
     137Cs 3.7 Bq/l...1000000 Bq/l (Bq/kg)
     40K 50 Bq/l...20000 Bq/l (Bq/kg)
     226Ra 10 Bq/l...10000 Bq/l (Bq/kg)
     232Th 10 Bq/l...10000 Bq/l (Bq/kg)
Intrinsic relative errorof volumetric (specific) activity ±20% max.
measurement with confidence probability P=0.95  
Measured sample density range 0.1 g/cm3...3 g/cm3
Minimum measured volumetric activityof 137Cs 5.7 Bq/l
radionuclide in potable water for Marinelli beaker  
geometry during 1-hour measurement with ±50%  
statistical error (Р=0.95)  
Energy rangeof measured gamma radiation 50 keV...3000 keV
Number of ADC channels 512
Integral nonlinearity ±1% max.
Intrinsic backgroundfor 137Cs window <2 cps
Relative energy resolutionfor 137Cs <8%
Operation mode setup time 10 min
Continuous run time ≥24 h
Measurement instabilityduring continuous service ±3% max.
Working temperature range 0°С...+40°С
Relative humiditywith air temperature ≤30оС 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


Servicios a la Industria Nuclear y Convencional, S. A. de C. V.
Cumbres de Acultzingo #26 Int. 104
Col. Narvarte Oriente, Del. Benito Juárez, C. P. 03020, Ciudad de México
Teléfono: (55) 5523 5400     E-mail:

Está aquí: Inicio Medidores de Radiación Espectrómetros y Activímetros Detectores de NaI(Tl) Monitores de Actividad Gamma AT1320, AT1320A y AT1320B