Distributed fiber optic temperature measurement system
Based on the principle of Raman scattering effect, Fuzhou Yinuo Technology has developed a technology
Dimensions and Specifications of Temperature Measuring Optical Cables
Temperature-measuring optical fibers typically use 200-micron core fibers with standard ST-bushing connectors for installation.
Typical Fiber Dimensions
In distributed temperature sensing (DTS) systems, the optical fiber itself usually has a core diameter of around 200 microns, which is common across different manufacturers . This size allows for reliable light transmission and accurate temperature measurement over long distances, often exceeding 30 km, while maintaining high spatial resolution (1 m or better) and temperature accuracy within ±1 °C . The fiber is usually encased in protective coatings or jackets to withstand environmental conditions.
Connectors and Installation
Temperature-measuring optical cables often use standard ST-bushings at installation points, such as on tank walls or oil transformers . These bushings provide a leak-proof interface and simplify integration with DTS units. The ST-bushing standard ensures compatibility with most DTS systems and allows for secure, maintenance-free installation.
Performance Considerations
- Temperature range: Many DTS fibers operate reliably from -40 °C to 120 °C .
- Spatial resolution: Typically 1 m, with some systems capable of finer resolution.
- Measurement principle: Optical fibers detect temperature changes via variations in light scattering (Raman or Brillouin scattering), enabling continuous temperature profiling along the cable .
Summary
While there is no single universal standard for all temperature-measuring optical cables, 200-micron fibers with ST-bushing connectors are widely used in industry-standard DTS systems. These dimensions balance mechanical robustness, optical performance, and ease of installation, making them suitable for applications in data centers, industrial tanks, and transformer monitoring .
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