Portable Contamination Monitor with thin plastic scintillation detector for highly sensitive measurement of α-, β- and γ- contamination
Regulations for Radiation Protection Ordinance require that anyone working with unsealed radioactive materials must be checked regularly to see whether work areas, protective clothing or the body surface has become contaminated.
System Features
• The innovative detector technology with thin-layer plastic scintillator provides key benefits over gas-filled or gas flow proportional detectors. These include reduced operating expenses, i.e. consumable gas and high repair costs in the
case of Xenon detectors
• α-, β- and γ-radiation can be measured using one detector.
The measuring system automatically detects the presence of α-radiation. Simultaneous, selective measurement of α- and β-/γ-contaminations is possible
• user-friendly, menu-driven configuration
• important measurement parameters are protected
by pass code number
• calibrated reference nuclide file with integrated auto calibration
• lightweight
• integrated storage of measurement data, software for readout and processing of measurement data
• connection option for different external detectors,
e.g. for dose rate measurement
• automatic detector identification
• fixed location operation with wall mount including of inductive charging, controlling of measurement time and switching between background measurement and contamination measurement.
| Technical Data | |
|---|---|
| Detector type | thin-layer plastic scintillation detector with ZnS coating |
| Detector size | 170cm² |
| Background | α: approx. 0.1cps α/β: approx. 15 – 25cps |
| Background subtraction | with adjustable background measurement time |
| Measurement electronics | μ-controller supported electronics |
| Keyboard | foil keyboard, 5 function keys |
| Alarm | separately adjustable for each nuclide, acoustic alarm |
| Result display | either in cps or nuclide-specific in Bq or Bq/cm² |
| Nuclides | 25 nuclides, preset calibration factors, user-specific nuclides may be added integrated auto calibration |
| Measurement time | continuous, for stationary operation adjustable in s |
| Display | large-area, graphical LC display 128x64 pixels, with illumination, duration of illumination adjustable |
| Power supply | 2 batteries, AA Mignon or corresponding rechargeable batteries, (NiCd, NiMH), can be charged via charge unit, in stationary mode via wall station with inductive charge conservation |
| Temperature range | –10°C to 40°C, no condensation special version up to –20°C |
| Dimensions | 280x125x135mm (L(with handle)xWxH) |
| Weight | ca. 750g (including batteries) |
| Housing | ergonomically shaped plastic housing |
| Interfaces | serial interface RS-232 boost charge/line operated external detectors |
| Efficiencies for various radionuclides Average values from measurements with 100cm² compound | |
|---|---|
| C-14 | approx. 14 % |
| F-18 | approx. 18 % |
| P-32 | approx. 25 % |
| S-35 | approx. 12 % |
| CI-36 | approx. 42 % |
| K-40 | approx. 30 % |
| Co-57 | approx. 7 % |
| Co-60 | approx. 27 % |
| Sr-89 | approx. 27 % |
| Sr-90/Y-90 (related to Sr-90) | approx. 42 % |
| Tc-99m | approx. 3 % |
| In-111 | approx. 8 % |
| I-123 | approx. 7 % |
| I-125 | approx. 12 % |
| I-131 | approx. 21 % |
| Cs-137 | approx. 35 % |
| Au-198 | approx. 23 % |
| Ti-204 | approx. 43 % |
| Am-241 α | approx. 22 % |
| P-238 α | approx. 12 % |
| U-238 α | approx. 26 % |
Documents
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