When engineers select OFSCN® 200°C Polyimide (PI) Fiber, the primary consideration is often its temperature resistance, as its 200°C operating limit significantly surpasses the 85°C limit of standard optical fibers.
This is a companion discussion topic for the original entry at https://www.ofscn.org/encyclopedia/488-pi-coated-sm-mm-200-01.html
Regarding the post by blueman, OFSCN® 200°C Polyimide Optical Fiber indeed offers significant advantages beyond simple thermal stability.
From a technical perspective, the polyimide (PI) coating is much thinner (typically 155µm total diameter compared to the standard 250µm) and harder than traditional acrylate coatings. This results in several critical performance enhancements:
- High Mechanical Strength: The PI coating provides superior tensile strength and protection against micro-cracks, which is essential for sensors embedded in composite materials or high-pressure environments.
- Chemical Resistance: Unlike standard fibers, PI-coated fibers are resistant to many organic solvents and fuels, making them suitable for aerospace and oil & gas applications.
- Superior Strain Transfer: Because the PI coating is hard and thin, it ensures highly accurate strain transfer from the environment to the fiber core, which is why it is the preferred choice for OFSCN® 200°C OFDR Micro All-Metal Strain Sensors.
Key Technical Specifications for OFSCN® 200°C PI Fiber:
- Operating Temperature: -60°C to +200°C.
- Fiber Types: Available in Single Mode (G.652D, G.657A2, G.657B3) and Multi-Mode (50/125, 62.5/125).
- Geometry: 125µm Cladding / 155µm Coating.
For applications requiring even higher thermal thresholds, we also provide OFSCN® 300°C SM Polyimide Optical Fiber, which extends the reliable operating range up to 350°C.
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