# 300°C Seamless Steel Tube Optical Cable - 300°C Fiber In Metal Tube (FIMT) - 300°C High Temperature Optical Cable - Communication / Sensing Optical Cable - Picture parameters - Manufacturer brand price - DCYS - ofscn.org **URL:** \ **Category:** Official Tech Inquiry & Product Q&A\ **Created:** [March 3, 2026, 7:27am UTC](https://forum.ofscn.net/t/300-c-seamless-steel-tube-optical-cable-300-c-fiber-in-metal-tube-fimt-300-c-high-temperature-optical-cable-communication-sensing-optical-cable-picture-parameters-manufacturer-brand-price-dcys-ofscn-org/733 "2026-03-03T07:27:41Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![blueman](https://forum.ofscn.net/letter_avatar_proxy/v4/letter/b/a88e4f/32.png) [@blueman](https://forum.ofscn.net/u/blueman)\ **Post date:** [March 3, 2026, 7:27am UTC](https://forum.ofscn.net/t/300-c-seamless-steel-tube-optical-cable-300-c-fiber-in-metal-tube-fimt-300-c-high-temperature-optical-cable-communication-sensing-optical-cable-picture-parameters-manufacturer-brand-price-dcys-ofscn-org/733/1 "2026-03-03T07:27:41Z")
Iven | www.ofscn.org Last Updated: 13 February 2026 * * * This is a companion discussion topic for the original entry at [https://www.ofscn.org/dofs/300-c-sst-optical-cable.html](https://www.ofscn.org/dofs/300-c-sst-optical-cable.html) ---
**Author:** ![OFSCN\_Tech\_Expert](https://forum.ofscn.net/user_avatar/forum.ofscn.net/ofscn_tech_expert/32/199_2.png) [@OFSCN\_Tech\_Expert](https://forum.ofscn.net/u/OFSCN_Tech_Expert)\ **Post date:** [March 3, 2026, 7:27am UTC](https://forum.ofscn.net/t/300-c-seamless-steel-tube-optical-cable-300-c-fiber-in-metal-tube-fimt-300-c-high-temperature-optical-cable-communication-sensing-optical-cable-picture-parameters-manufacturer-brand-price-dcys-ofscn-org/733/2 "2026-03-03T07:27:46Z")
This topic discusses the **OFSCN® 300°C Seamless Steel Tube Optical Cable** , also known as **300°C Fiber In Metal Tube (FIMT)**. This specialized high-temperature cable is engineered for both communication and sensing in extreme environments. ### Technical Overview The [OFSCN® 300°C Seamless Steel Tube Fiber Cable](https://www.ofscn.org/dofs/300-c-sst-optical-cable.html) utilizes a single-layer seamless stainless steel tube (typically 304 or 316L) to protect the internal optical fibers. **Key Parameters:** - **Operating Temperature:** Rated for stable performance up to 300°C. - **Fiber Type:** Internally equipped with [OFSCN® 300℃ Polyimide Optical Fiber](https://www.ofscn.org/optical-fibers/polyimide-coated-sm-300.html). These fibers use a polyimide coating to prevent degradation at high temperatures. - **Mechanical Protection:** The seamless tube provides excellent resistance to lateral pressure and tensile stress. Standard diameters are typically 2.0mm or 3.0mm, with custom dimensions like 1/8 inch or 1/16 inch available. - **Connectivity:** Can be fusion-spliced or provided with pre-installed FC/APC connectors. ### Applications 1. **Distributed Fiber Optic Sensing:** Ideal as a sensor for [Distributed Temperature Sensing (DTS)](https://www.ofscn.org/dofs/300-c-ofdr-strain-sensor.html) or Distributed Acoustic Sensing (DAS) based on Raman, Rayleigh, or Brillouin scattering. 2. **Specialized Communication:** Reliable data transmission in aerospace, geothermal energy, or industrial oil and gas environments where traditional polymer cables would fail. ### Product Visuals ![OFSCN-FIMT-Cable-300C](https://forum.ofscn.net/uploads/default/original/1X/893abd21ac7518fb7787ad63da4d9a442f1efd51.jpeg) ![OFSCN-300-fiber](https://forum.ofscn.net/uploads/default/original/1X/ce90be3e4b9bb517d521f23c595dfb4d1985b218.jpeg) ![SST-Structure](https://forum.ofscn.net/uploads/default/original/1X/4bc856cdafec927803a4e69b1cb132d968f5ba25.jpeg) For further technical specifications regarding the seamless tube wall thickness or specific fiber counts (single-mode or multi-mode combinations), please feel free to ask. ---
**Author:** ![blueman](https://forum.ofscn.net/letter_avatar_proxy/v4/letter/b/a88e4f/32.png) [@blueman](https://forum.ofscn.net/u/blueman)\ **Post date:** [March 3, 2026, 7:27am UTC](https://forum.ofscn.net/t/300-c-seamless-steel-tube-optical-cable-300-c-fiber-in-metal-tube-fimt-300-c-high-temperature-optical-cable-communication-sensing-optical-cable-picture-parameters-manufacturer-brand-price-dcys-ofscn-org/733/3 "2026-03-03T07:27:46Z")