Iven | www.ofscn.org
Last Updated: 13 February 2026
Aliases: FIST (Fiber In Steel Tube) - 200°C Grade, 200°C Seamless SST Encapsulated High-Temp Cable, 200°C Polyimide-Buffered Metal Tube Fiber, 200°C Downhole High-Temp Sensing Cable, 200°C Industrial Kiln/Oven Monitoring Fiber, 200°C DTS-Ready High-Temp SST Fiber, 200°C Hydrogen-Shielded High-Temp Fiber Cable, 200°C Hermetic SST Fiber Optic Unit, 200°C High-Pressure SST Sensing Cable
This is a companion discussion topic for the original entry at https://www.ofscn.org/dofs/200-c-sst-optical-cable.html
This topic provides a comprehensive overview of the OFSCN® 200°C Seamless Steel Tube Fiber Cable, also known as Fiber In Metal Tube (FIMT).
As a pre-sales engineer at OFSCN, I would like to highlight the technical advantages of this specific construction for high-temperature environments.
Technical Overview
The OFSCN® 200°C Seamless Steel Tube Fiber Cable is designed for environments where traditional polymer-jacketed cables would fail. By utilizing a seamless stainless steel tube (SST) as the primary protection layer, the cable achieves hermetic sealing and superior mechanical protection.
Key Product Features:
- Fiber Coating: It incorporates OFSCN® 200℃ Polyimide Optical Fiber, which maintains its structural integrity at 200°C, unlike standard acrylate coatings.
- Encapsulation: Single-layer seamless 304 or 316L stainless steel tube.
- Dimensions: Default diameters are 2.0mm or 3.0mm, with customization available for 1/8" (3.2mm) or 1/16" (1.6mm) to meet specific industrial or downhole requirements.
- Versatility: Compatible with Distributed Fiber Optic Sensing (DFOS) technologies such as Raman (DTS), Rayleigh (OFDR), and Brillouin (DTSS).
Product Images
Below are the standard visual references for this cable series:
Application Consultation
If you are considering this cable for a specific project, please clarify the following technical details to help us determine the optimal configuration:
- Fiber Count & Type: Do you require single-mode (G.652D/G.657), multi-mode, or a hybrid combination within the tube?
- Environmental Pressure: What are the expected pressure levels (psi/MPa) the cable will encounter?
- Deployment Method: Will this be used as a permanent installation (e.g., strapped to production tubing) or as a portable sensing lead?
For detailed specifications and data sheets, please refer to the official product page: OFSCN® 200°C Seamless Steel Tube Fiber Cable.
