Distributed Acoustic Sensing is a reflectometry technique that uses Rayleigh scattering, inside an optical fiber, to detect vibrations in a distributed way. This technique transforms already installed fiber optics into a chain (>50 km) of small vibration sensors. At detected vibrations are a response to any physical event surrounding the fiber, which can be: people walking and running, manual and automatic digging, oil and gas leaks, oil and gas flow, plane wing vibrations, road traffic.

Distributed Temperature Sensing is a reflectometry technique that uses Raman and/or Brillouin scattering, inside an optical fiber, to detect the temperature in a distributed way. This technique transforms already installed fiber optics into a chain (>50 km) of small temperature sensors. Distributed temperature measurement has a wide range of applications: oil and gas leaks, hihg power cable monitoring, engines monitoring, switchgear monitoring, structure.