Multi Layered FIMT

Optical Fiber Reinforced with Multiple Layers

The design of the Multi Layered Tube (MST) is all about offering strength and security. The inner layers protect the optical fibers from hydrogen and other potentially harmful environmental influences, while the outer layers protect the configuration from mechanical stress.

The fiber optic cable is suitable for direct installation or integration in larger cable configurations. In addition, we offer custom and bespoke solutions, and the MST can be produced with up to 144 fibers at 250μm or 192 fibers at 200μm, making it perfect for fiber optic sensing and data transmission.

The solution performs well in harsh surroundings, including those found in the Military & Defense, Marine, and Oil & Gas industries. Our optical fiber, reinforced with multiple protective layers, is perfect for Distributed Temperature Sensing (DTS) and Distributed Acoustic Sensing (DAS).

Contact us today for a customized Multi Layered Tube solution that will be designed and produced according to the exact needs of your project.


Product abbreviation MST
Cable usage Data Transm. & Sensing
Outer diameter 1.6 mm up to 7.0 mm
Wall thickness per layer 0.125 mm up to 0.300 mm
Approx. Cable weight 9 kg up to 150 kg per km
Max. steel tube layer options up to 4
Maximum fiber count 144 (250µm), 192 (200µm)
Maximum continuous length Up to 40 km
Filling compound H2 absorbing optionally
High mechanical strength Tests acc. latest standards
Cost effective steel grade mixing Wide range possible

All values, product specifications and other given data are subject to change without notice to improve reliability, function, design or otherwise. Information contained in this data sheet are up-to-date as at the date of issue. As NBG cannot control or anticipate the conditions under which this product may be used, each user should review the information in specific context of the planned use. To the maximum extent permitted by law, NBG will not be responsible for damages of any nature resulting from the use or reliance upon the information contained in this data sheet.

Product overview created by Patrick Weissinger – 21.03.2019

Optical fibers

Metal Tube 1

Metal tube 2


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