High-accuracy distributed strain and temperature sensing.
Fully redundant configuration. For embedded or surface mounted installation.


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 temperature effects through 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 SMARTprofile II 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, nor in environments with aggressive chemi-cals. 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.





  Temperature Range  
  Operating temperature:   -40 °C to +60 °C
  Storage temperature:   -5 °C to +40 °C
  Installation temperature:   -5 °C to +50 °C
  Pigtails and connectors:   -40°C to +60°C



Technical Data             
  Temperature      compensation:   through single mode temperature fibers with DiTeSt BOTDA / BOTDR, if strain ≤ 0.2 % through    multi mode temperature fibers with DiTemp ROTDR, insensitive to mechanical strain
 Calibration:   during production
  Strain range:   -1.5 % to +1.5 %
  Maximal length:   700 m / reel, more upon request
  Dimensions (W x H):   8.0 mm x 4.0 mm
  Weight:   22 ± 0.5 kg/km
  Max tensile strain:  1.5%
  Min bending radius:   400 mm (long term)
  Hydrostatic pressure:   300 kPa (3 bar)



  Fiber Types  
  Fiber support  (strain):   2 SMF 9 / 125 um Polymide coated ITU-T G.652.D compliant
  Fiber support   (temperature):   2 SMF 9 / 125 um Acrylate coated ITU-T G.652.D compliant
  2 MMF 50 / 125 um Acrylate coated ITU-T G.651 compliant
  Fiber attenuation   (cabled @ 20 °C):   ≤ 1.2 dB @ 1310 nm -SMF strain ≤ 3.0 dB @ 850 nm -MMF     temperature≤ 1.0 dB @ 1550 nm -SMF strain ≤ 1.0 dB @ 1300   nm -MMF temperature≤ 0.4 dB @ 1310 nm -SMF temperature≤ 0.3 dB @ 1550 nm -SMF temperature
  Number of fibers:   2 SMF strain fibers + 2 SMF temperature fibers + 2 MMF   temperature fibers





11.1030 DiTeSt SMARTProfile II Sensor



  • Cable termination with connectors
  • Junction box
  • Splice box