Rectangular FIMT

Rectangular Steel Tube

We have a reputation for delivering custom fiber optic cables, producing different shapes for different applications. The Rectangular Tube (RFT) is an example of one custom optical sensing solution, but we can deliver any build you could require with our highly versatile machines. Come to us with your challenge, and we will reply with the best solution.

Our Rectangular FIMT is perfect for directional maintaining mounting, orientation maintaining, flow monitoring, Distributed Temperature Sensing (DTS), and many additional customizable features. The shape, the filling compounds, and different fiber types can all be changed to perform in the face of any challenge in the field.

The protective steel layer protects the optical fiber cables. The maximum fiber count of our rectangular steel tube is 2 at an OD of 250µm. Contact us today to speak to one of our experts about the possibility of using our Rectangular FIMT in one of your projects.


Product abbreviation RFT
Cable usage Sensing
Outer dimension 1.3 mm x 1.3 mm
Wall thickness 0.125 mm
Approx. Cable weight 4 kg per km
Maximum fiber count 2 (250µm)
Maximum continuous length Up to 15 km
More shapes and dimensions On request
Filling compound H2 absorbing optionally

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


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