Technical notes


DITEST - Features & Benefits

DITEST measuring technique is the most advanced and exciting fiber optic distributed sensing technology.

Omnisens DITEST offers significant advantages over both traditional measurement methods and other distributed sensing methods:

  • Reliable temperature/strain measurement
    the DiTeSt is able to measure either temperature or strain, or both, using the same optical fiber. Alternatively, when installation conditions dictate, temperature and strain can be measured using separate fibers operating on different channels of the same instrument. For temperature monitoring, the optical fiber is installed within protective loose tubing thereby preventing strain conditions from having a significant effect on temperature measurements. For strain monitoring, a dedicated strain sensor is required, in order to transfer strain to the fiber.
  • Proven measurement technology
    Omnisens systems are built using proven components and have been developed with the emphasis on measurement reliability and accuracy. • Flexible solutions - the unique optical signal processing technique incorporated in DiTeSt brings a high level of flexibility to suit a wide range of applications and environments.
  • Superior reliability, accuracy and repeatability
    automatic setting of optical intensities are user-configurable to optimise the performance in various measurement conditions.
  • Excellent performance high resolution or fast acquisition applications
    adjustable probe signal intensity solves the problem of lossy fibers or attenuation associated with spontaneous scattering techniques.
  • High dynamic range
    measurement performance can be maintained with up to 20 dB of attenuation. • Faster measurement times - measurements using stimulated Brillouin scattering require less averaging than other techniques. 30 km of fiber can be measured in as little as 1 to 2 minutes typically.
  • Longer range measurements
    up to 30 km range per channel, with a spatial resolution of better than 2 m. Optional channels and modules may be fitted to allow measurement of up to 250 km.
  • Cost-effective fiber optic sensor
    the physical attributes and cost-effectiveness of optical fiber make it particularly suited for long distance applications such as monitoring pipelines, power cables and overhead lines.
  • Suitable for demanding environments
    different types of optical fiber sensor for both temperature and strain monitoring are available to meet the demands of a wide variety of installations. For example, sensors with enhanced crush resistance and rodent damage protection are available for subterranean, submarine and tunnel environments.