Mirion Technologies TwoStep-Exit II - Manual (Page 2)

OpTIOns
• GammaFibre TM detectors
• Beta/Gamma hybrid detectors
• Various grid transparencies for detector
protection
• Extended Mini-UPS by adding batteries
• Reversible walk-through direction
• Additional display at exit side
• Sliding doors and/or barriers
• Head detector
• manual or
• automatic or
• adjustable by telescopic bar
• Small-items box/es
• Link to CeMoSys
TM server for central monitoring
• Integrated card, bar code or dosimeter reader
• pdf and network print
MOnITOr DescrIpTIOn
• Real-time, multi-tasking operating system QNX
• RADOS industrial PC 2010
• 15” touch screen
• Passageway illumination (LED)
• Service illumination (LED)
• Automatic start of measurement when entering
monitor
• P 2 accelarator to reduce measuring time
• Service via touch screen with key lock system
• Large detector door with quick fastener to be
able to access monitor quickly & easily
• Voice prompts
• Up to 4 languages selectable via touch screen
from a whole range
• Stainless steel housing easily decontaminated
FIBre DeTecTOrs
Fibre detectors feature an increasing sensitivity towards
the edges. Linked up over the whole length of monitor
the detection response will be homogeneous in total.
Additionally, dead zones in between detectors are
reduced and therefore lead to much improved detection
results (see fig. 1-3).
Further features of fibre technology:
• Rugged detector technology without electronics,
connected by light fibre, all parts are standardised
thoroughly. Benefit: much reduced operation and
maintenance costs
• Detector repair by customer’s personnel possible
• Plug & Play properties for the detectors
• Improved detector door geometry and positioning
leads to a further increased detection probability by
decreasing detector to body distance
• BetaFibre™ detectors
• low sensitivity to increased gamma background
• low false alarm rates
• low detection limits
• Option: GammaFibre™ detectors for separate
detection of gamma sources for body, hands, feet, and/
or small items
• Option: Beta/Gamma hybrid detector, thyroid and
thorax monitoring possible
Detector sensitivity in comparision
Gas-flow detector (fig. 1): Homogeneous, but large zones with low
sensitivity at the edges.
Beta-plast detector (fig. 2): Steeply decreasing sensitivity at the
edges, ie extensive dead zones in between detectors.
Fibre detector (fig. 3): sensitivity increases towards the edges, which
leads to homogeneous sensitivity in total and only marginal dead
zones in between detectors.
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