FBG Extensometer  

│ DESCRIPTION │

* Usage
- Measuring displacement and crown settlement of tunnel type structure. 

* Features
- Safety evaluation of structures
- Measurement of Tunnel Convergence and Crown Settlement
- Simultaneously measuring both angle and deformation
- Measuring based on the combination of vector diagrams
- No Effect of electromagnetic waves
- High Accuracy of measurement
- FBG Strain sensor(length deformation)+FBG Tiltmeter(tilt angle) =Possible to calculate 2D tunnel

  deformation with 2D vector diagrams

* Specification
- Measurement range(με)1) : ± 2,000
- Measurement range(deg)1) : ± 3
- Gauge length(mm)1) : 250~1,500
- FWHM, - 3 dB point(nm) : ≦ 0.1
- Resolution(% F.S.2)) : ± 0.05
- Accuracy(% F.S.2))1) : ± 0.25
- Reflectivity(%) : ≧ 70
- Wavelength(nm) : 1,511 ~ 1,584
- Operating temperature(℃) : - 20 ~ 80
   1) Depending on user’s demand
   2) Full Scale