AT1125 Radiation Monitor (with external beta radiation smart probe)

Portable high-sensitivity radiation monitor is designed for searching and detecting gamma radiation sources, measuring ambient equivalent power and gamma-radiation ambient dose equivalent, measuring beta-particles flux density from flat contaminated surfaces and surface activity measurement.
Features
  • Multiple functions
  • High sensitivity
  • Spectrometric method of measurement
  • Field operation capability over a wide temperature range
  • Efficient LCD display back-lit function
  • Integrated system for measurement path LED stabilization
  • Threshold level exceeding alarm
  • Memory function for 100 measurement results
  • Measurement results are written, stored and transmitted to PC using RS232 or USB (via adapter) interface
Applications
  • Powerful search, detection and localization function for sources of ionizing radiation
  • Background radiation monitoring
  • Radiation monitoring of ecological environment, areas, facilities, stock and material
  • Beta-particles flux density measurement on contaminated surface areas and measurement of surface beta-radionuclide activity
  • Individual working places radiation monitoring and radiometric surveillance in manufacturing facilities, research laboratories and health care institutions
  • Scrap metal radiation monitoring
Operating principle
Scintillation NaI(Tl) detector provides high sensitivity and low response time to minor changes in radiation background. Furthermore, it allows accurate dose rate measurement over a wide range of gamma-ray energy from 0.05 MeV to 3 MeV with the help of the “spectrum-dose” corrective function.

 

The radiation monitor can be bundled with a BDPB-01 External intellectual scintillation detection unit, used for the beta-particles flux density measurement on contaminated surface areas and measurement of surface beta radionuclide activity.
 

Radiation monitor used with BDPB-01 external detection unit and 1.7 m telescopic bar PC connection

Features

Standard dependence of the upper limit
of the dose rate measuring range from
gamma radiation energy of
scintillation detection channel
Standard radiation monitor anisotropy
АТ1125 Radiation Monitor
Detector Scintillator NaI(Tl) Ø25x40mm
Ambient gamma and X radiation dose rate equivalent measurement range 30nSv/h ... 300µSv/h
Ambient gamma and X radiation dose equivalent measurement range 10nSv ... 10mSv
Intrinsic relative error of dose rate and dose measurement ±15%max.
Energy range 50 keV…3 MeV
Sensitivity energy dependence within energy ranges of 50 keV…3 MeV ±15%
Sensitivity  
            to 137Cs gamma radiation 350 cps/µSv/h-1
            to 241Am gamma radiation 3800 cps/µSv/h-1
Natural radiation background measurement time of 0.1 µSv/h with statistical error ±20% (Р=0.95) ≤15 sec
Power supply Internal rechargeable Ni-MH battery or AC power adapter.

The accumulator unit is charged from:
a) AC mains, (230 ± 23) V, (50 ± 1.0) Hz;
b) external DC supply, voltage 12 (+2.0; −1.5) V and output current not less than 1.0 A.
Internal battery run time ≥24 h
Operation mode setup time 1 min
PC interface RS232 or USB
Protection class IP54
Working temperature range 20°C…+50°C
Relative humidity with air temperature ≤35оС without condensation ≤90%
Overall dimensions, weight 258x85х67 mm, 1.0 kg
   
BDPB-01 External detection unit
Detector plastic scintillator, Ø60x1 mm 
Beta particle flux density measurement range 1…5·105 particles/(cm2·min)
90Sr + 90Y surface activity measurement range 4.4·10-2…2.2·104 Bq/cm2
Maximum energy range for the detected beta particles spectrum 155 keV…3.5 MeV
Intrinsic relative error of surface activity and flux density measurement ±20% max.
Sensitivity to 90Sr + 90Y beta radiation 0.3 cps/(particles·min-1·sm-2)
Protection class IP64
Working temperature range 20°C…+50°C
Relative humidity with air temperature ≤35оС without condensation ≤90%
Overall dimensions, weight Ø80x196 mm, 0.7 kg

Radiation Monitor meets 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