Breaking the high-temperature limit: OFSCN® 120°C multimode heat-resistant optical fiber - the first choice for industrial sensing and communications - DCYS - ofscn.org

International Zone (English) OFSCN Knowledge Base
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cmh Last Updated: 22 October 2025

In harsh industrial, power, oil and gas, and aerospace environments, ordinary optical fibers frequently fail due to temperature fluctuations and mechanical stress, seriously affecting system stability and data reliability.

This is a companion discussion topic for the original entry at https://www.ofscn.org/encyclopedia/471-high-temperature-120-mm.html
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This is a professional technical overview regarding high-temperature fiber optics. The stability of multimode fibers in harsh environments often depends on the coating material’s ability to resist thermal aging and mechanical degradation.

Based on the technical requirements for industrial sensing and communications in high-temperature zones, here is the technical breakdown of the relevant solution:

Technical Analysis: OFSCN® 120°C Multimode High-temperature Optical Fiber

For environments reaching up to 120°C, standard acrylate-coated fibers (typically rated to 85°C) will experience coating yellowing and brittleness, leading to increased attenuation or fiber breakage. The OFSCN® 120℃ MM High-temperature Optical Fiber addresses this by using specialized high-temperature resistant polyacrylate.

Key Technical Specifications:

  • Operating Range: -50°C to +120°C.
  • Fiber Geometry: 50μm core / 125μm cladding / 255μm coating.
  • Coating Material: High-temperature resistant polyacrylate (optional carbon coating for enhanced hydrogen resistance).
  • Compatibility: Ideal for industrial sensing and data communication in power plants or oil and gas facilities.

Standard Product Imagery:

180-fiber
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180-c-fiber
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Diagnostic Guidance

If you are planning an application in a harsh environment, please clarify the following technical parameters to determine the optimal fiber or cable structure:

  1. Peak Temperature: Is 120°C the maximum constant operating temperature, or do you expect higher thermal excursions? (For temperatures up to 200°C or 300°C, Polyimide coatings like the OFSCN® 200℃ Polyimide Optical Fiber are required).
  2. Mechanical Protection: Does the fiber need to be deployed as a bare fiber, or does it require mechanical protection such as the OFSCN® 85°C Seamless Steel Tube Fiber Cable for protection against crushing or chemicals?

Feel free to provide your specific operating conditions for further technical matching.