DITEST-LTM - Long range distributed Temperature Monitoring

DITEST-LTM provides long distance temperature monitoring capabilities with no compromising on performance.

features & benefits:

The DITEST-LTM combines OMNISENS DITEST measuring technique with “best-in-industry” dedicated sensing cable, data processing, user-friendly interface and application oriented visualization tools. DITEST-LTM Solution is optimized for long distance monitoring applications with extensive application know-how and field experience.

 
  • Distributed temperature monitoring over more than 40 km per channel with meter localization
  • Fast acquisition time with maintained eprformance - 1 minute
  • Extended monitoring capabilities; up to 250 km with single instrument allowing the monitoring of remote areas.
  • High optical loss budget (high dynamic range >10dB) - Margin for errors in installation, varying fiber attenuation
  • Permanent continuous monitoring with the automatic detection of abnormal conditions and interface with third party’ systems.

DITEST-LTM - Components

measuring system

DITEST-LTM integratesOMNISENS core sensing technology DITEST-STA optimized for long distance monitoring applications with extensive application know-how and field experience.

DITEST-STA
  • Monitoring distance : > 30 km per sensor
  • Operates with standard singlemode optical fibers
  • Spatial resolution : 1 m (*)
  • Temperature resolution : < 0.5°C (*)
  • Optical loss budget : >10 dB (*)

(*) Temperature resolution, spatial resolution, distance range and acquisition time are inter-related. See DITEST datasheet or technical note for more information about performance specifications.

sOFTWARE PACKAGE

DITEST-LTM includes an application oriented software package which features:

 
  • Early detection of abnormal temperature changes
  • Application oriented graphical user interface
  • Sensing cable segmentation in user defined sections with different characteristics
  • User defined alarm settings
  • Configuration of Zones with associated alarms and relays activation
  • Automatic compensation of temperature effects on strain measurements
  • Data management, system interfacing and communication

Temperature detection - fiber optic cable

FO sensors

Long range Distributed temperature Optical Fiber Cable
The LTM OFC can accommodate up to 8 fibers. It is a robust cable suitable for direct burial as it integrates rodent protection. The cable includes the optical fibers used for temperature monitoring as well as spare fibers for data communication between the instruments and the control room.

Project Engineering

in each project, Omnisens in collaboration with its solution providers offers project management, specific design specifications with respect to project requirements, complete documentation and implementation plan, installation drawings, training, commissioning and deployment capabilities.

Additional System components

Depending on the project requirements, cabinet, uninterrupted power supplies, batteries, patch panels,
SO-N-2 optical switch modules, data server, can be provided as additional system components.

DRM / DRR / DRRM

DITEST-STA Distributed temperature and strain distributed sensing

Distance range extension (DRR) and Remote Measurement (DRM) modules
The DRR/DRM/DRRM DITEST modules are designed to extend the monitoring capabilities of the DITEST-STA measuring unit, enabling more than 250 km of monitoring distance without compromising on the measurement performances.

The DRR/DRM/DRRM DITEST modules can integrate multiple channel capabilities and are remotely controlled by the DITEST-STA unit via the integration of a dedicated DRM channel to the measuring unit.

Applications

The DITEST-LTM solution is designed to offer turnkey solutions for:

Pipeline flow assurance monitoring including detection and localization of leakage or blockage, abnormal temperature change or seabed migration.
Long distance temperature monitoring for power cables and overheadlines
Surveillance of dykes and water embankment for the early detection of seepage and overflow.