DiTeSt SMARTProfile II

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Distributed fiber optic sensor for civil and geotechnical integrity monitoring.

The SMARTprofile II combined strain and temperature sensor is designed for distributed deformation (average strain) and temperature monitoring (average temperature) over long distances, using BOTDR / BOTDA (Brillouin scattering) and ROTDR (Raman scattering) technologies.

The SMARTprofile II sensor consists of two bonded and two free single-mode optical fibers (BOTDA / BOTDR) and two free multi-mode fibers (ROTDR) embedded in a polyethylene thermoplastic profile. The bonded single-mode fibers are used for strain monitoring with BOTDA / BOTDR system, while the free single-mode fibers are used to create an optical loop for BOTDA measurement or for temperature measurements with BOTDA / BOTDR system (quantitative if sensor deformation < 0.2%, qualitative if sensor deformation > 0.2%) and to compensate temperature effects on the bonded fibers. The two additional multi-mode fibers are insensitive to mechanical strain and used for temperature measurement to compensate for temperature effects through the Raman system. For redundancy, two fibers are included for both strain and temperature monitoring. The profile itself provides good mechanical, chemical, and temperature resistance. The small size of the profile makes the sensor easy to transport and install by embedding in concrete or mortars, gluing, or clamping.

The sensor is designed for use in environmental conditions typically found in civil, geotechnical, and oil & gas applications. However, this sensor cannot be used in extreme temperature environments or environments with aggressive chemicals. It is not recommended for installation under permanent UV radiation (e.g., sunshine) without an additional cover or aluminum tape protection.

The SMARTprofile II sensing cable is delivered on spools with all the necessary accessories.