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DiTeSt - Model BOTDR SR 5 KM -Fiber Optic Interrogator
Cost effective fiber optic interrogator 5 km measurement range botdr single-end mode. Compatible with all ditest strain and temperature sensing cables. Diview ii graphical user interface tuned. Reliable and optimized performance brillouin interrogator (botdr) for short range applications. Measure full strain and temperature profile over fiber optic sensing cables.
The DiTeSt BOTDR SR is a breakthrough in distributed strain sensing, as it is the new entry level interrogator sized to meet increasing demand for fiber optic distributed sensing. The DiTeSt BOTDR SR – Brillouin Optical Time Domain Reflectometry – exhibits cost and performance optimized for maximum length of distributed sensing cable up to 5 km; thus enabling implementation of DiTeSt technology for small to medium scale monitoring projects.
Distributed fiber optic sensing provides measurement every meter along the entire sensing cable; this is particularly important in such cases where the location of defects cannot be predicted, and localized instrumentation is therefore useless.
The DiTeSt BOTDR SR analyses the backscattered light in a singlemode fiber (SMF) in the so-called single-end configuration; with access to only one end of the fiber. DiTeSt technology uses a pulsed light to enable localization along the monitored fibers. Spectral analysis of the scattered light provides the Strain and Temperature information along the monitored fibers.
Distributed fiber optic sensing cables are relatively easy to deploy. Special care shall however be taking relative to cable selection and installation; DiTeST compatible strain sensing cables are proposed; SMARTape II, SMARTProfile II and Hydro&Geo sensing cables.
The DiView II Graphical User Interface enables real-time visualization and converts raw data in frequency measurements to strain and temperature real data. DiView II automatically triggers pre-warnings and alarms on strain level thresholds set by the user. Data are exportable to .txt files for integration in third party monitoring platforms.
- Global Strain Distribution mapping
- Spatial resolution 1 m
- Short range 5 km
- Acquisition time 15 min.
- 2 built-in channels
- Long term stability
- Automatic monitoring / Warning system
- Detection and localization of:
- Strains distribution evolution
- Onset of settlements
- Subsurface damages
- Abnormal joint movements
- Monitoring during construction:
- Concrete slabs
- Geotechnical piles
- Diaphragm walls
- Surrounding structures
- Safety operation / Life extension of critical assets:
- Bridges
- Buildings
- Dams, Dikes
- Geotechnical
- Nuclear Power Plants
- Tunnels, Penstocks
- Underground mines, Tailing Storage Facilities
Accessories and Ordering information
- 11.1021 DiTeSt SMARTape II Sensing Cable
- 11.1030 DiTeSt_DiTemp SMARTProfile II Sensing Cable
- 14.1420 DiTeSt_DiTemp Hydro & Geo Sensing cable
- 14.1410 DiTeSt Ordinary Temperature Sensing Cable
- 20.2010 DiView II Data Management Software
- On request: DiTeSt Optical Multiplexer 4 / 8 channels
- On request: DITeSt instrumentation cabinet, DiView II Server
Technical Features
- Number of channels: 2 built – in channels operating in BOTDR mode (single-end configuration)
- Distance range (Optical budget) : 5 km equivalent singlemode optical fiber (10 dB)
- Spatial resolution: 1 m
- Sampling interval: 0.25 m (at max. distance range)
- Acquisition time: From 3 minutes
- Measurement resolution: Strain: 10 to 20µm/m (0.02mm/m)
- Temperature : 1°C
- Typical for 15 min. acquisition time at 5 km with 1 m spatial resolution
- Fiber compatibility: Standard singlemode optical fibers (ITU G.652, ITU G657, ITU G.655)
Technical Specification
- Operating temperature: 0°C to 45°C
- Humidity: Max 85% non-condensing
- Protection rating: IP20
- Power supply: 100-240 VAC Typ. (90-264 VAC) / 50-60 Hz Typ. (47-63 Hz) / < 150VA
- Dimension (WxDxH) / Weight: 449 x 500 x 177.8mm (19” rack mountable – 4U high) / 15 kg
- Communication options: 2 x Ethernet port (RJ45)
- Optical connectors: E-2000 / APC (rear panel)
- Laser safety: Infrared radiation classified EN 60825-1 (2014) as Class 1M laser products