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Aerosol Monitoring System - AMS 02 - BITT TECHNOLOGY Aerosol Monitoring System

 

The AMS 02 Aerosol Monitoring System is an automatically working measuring system, for counting of radioactive aerosols, with routinely measuring of iodine, so that the non-natural radioactivity alpha -, beta - and gamma -radiation is counted. The system is equipped with a remote control unit, which enables communication from and to the central unit at any time. The AMS 02 Aerosol Monitoring System is a single filter system which enables different suction- and measuring programs. A further advantage is the possibility of testing the detectors through calibration filter. Furthermore, under usual conditions, used filters can be taken once more after decay of the natural radioactivity. Also filters can be extracted to make high-precise analysis in corresponding laboratories. Under usual conditions, one suction-cycle takes 24 hours with one and the same filter. Measuring-evaluations are made in intervals at 5 min. If there are abnormities, confirming in the next two measuring-cycles, that means after three measuring-cycles, the device switches on intensive-mode. On the intensive-mode a new filter is inserted and sucted for 1 hour. The Aerosol Monitoring System measuring evalution enables an exact qualitative and quantitative statement concerning the alpha -, beta - and gamma - nuclides, whereby the quality varies according to the detector type.

Aerosol Monitoring System Scheme

The equipment consists of the following units (fig.):

1. Unit for continuous sampling:

  • Aerosol filter + NaI(Tl) detector
  • Aerosol filter + PIPS-detector
  • Iodine filter (molecular) +NaI(TI)-detector
  • Iodine filter (organic) + NaI(TI)-detector

2. Further units:

  • Optional, Special measuring equipment
  • Filter manipulator
  • Racks for filters (filter stock)
  • Computer and control unit
  • Lead shielding
  • Maintenance-free air flow pump

DESCRIPTION

The filter equipment is served by a manipulator from a stock of 500 filters. Therefore high flexibility is reached and different measuring-programs can be used, depending on the given conditions. Furthermore there is the possibility for extension of the measuring places and also for the filter stock.

The AMS 02 Aerosol Monitoring System is an automatically working measuring system, for counting of radioactive aerosols, with routinely measuring of iodine, so that the non-natural radioactivity a -, b - and g -radiation is counted. The system is equipped with a remote control unit, which enables communication from and to the central unit at any time. The AMS 02 is a single filter system which enables different suction- and measuring programs. A further advantage is the possibility of testing the detectors through calibration filter. Furthermore, under usual conditions, used filters can be taken once more after decay of the natural radioactivity. Also filters can be extracted to make high-precise analysis in corresponding laboratories. Under usual conditions, one suction-cycle takes 24 hours with one and the same filter. Measuring-evaluations are made in intervals at 5 min. If there are abnormities, confirming in the next two measuring-cycles, that means after three measuring-cycles, the device switches on intensive-mode. On the intensive-mode a new filter is inserted and sucted for 1 hour. The measuring evalution enables an exact qualitative and quantitative statement concerning the a -, b - and g - nuclides, whereby the quality varies according to the detector type.

SENSITIVITIES

The smallest detectable radioactivity was calculated and determined for all detectors of the system, considering only realistic sampling and measurement situations. Values are given in Bq/m3 units for measurement time of 300 sec. They relate to the detector types, source-to detector geometry and - last but not least - to the data processing subroutines applied in the AMS-02 system only.

MAIN TECHNICAL PARAMETERS

  • Size: 73 x 92 x 152 (210) cm
  • Weight: approx. 415 kg
  • Power: 230 V AC / 50 Hz / 950 VA
  • Environment: Temperature -30C + 40C
  • Relative humidity 0 - 99 %

Units:

Detectors

Version 1:

  • - 2" x 2" Na(Tl) ( 3 pieces )
  • resolution @ 8 % (137Cs 662 keV)
  • peak-to-total ratio > 30 % ( 137Cs )
  • background ~ 4 cps
  • - PIPS 1700 mmresolution @ 55 keV (a 241Am)@ 30 keV (b )


Version 2:

  • - 2" x 2" Na(Tl) ( 2 pieces )
  • resolution @ 8 % (137Cs 662 keV)
  • peak-to-total ratio > 30 % ( 137Cs )
  • background ~ 4 cps
  • - PIPS 1700 mmresolution @ 55 keV (a 241Am)
    @ 30 keV (b )
  • - Coaxial germanium detector (HP Ge)resolution 2.0 keV FWHM at 1.33 MeVrelative efficiency 33% at 1.33 MeV

Controllers: Industrial PC Pentium

  • HDD 13,2 GB
  • FDD 1.44MB
  • Pump: Nominal flow rate ~ 6 (normal) m3/h
  • Filters: - 60 mm diameter glass fibre filter Schleicher & Sch?i>
  • type 10 (DIN 24 184)
    - 60 mm diameter paper filter with
  • active carbon impregnated( charcoal )
  • - Ag-activated silica gel filter column

The Bitt Technology range of Aerosol Monitoring System's are manufactured to ISO 9001 standard and are CE approved. All equipment is Brand New and comes complete with operating manual and a 1 year guarantee.

 
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