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Length of temperature-sensing optical cable

Temperature-sensing optical cables in distributed temperature sensing (DTS) systems can typically range from 2 km up to 50 km, depending on the system and fiber type.

Typical Operational Lengths

Short to medium-range DTS cables: Some commercially available DTS fiber optic cables, such as the Eurofyre DTSX, are available in specific lengths of 2 km, 4 km, 6 km, and 8 km for applications like fire detection and linear heat monitoring.

Long-range DT

S systems: Advanced DTS systems, such as the Yokogawa DTSX3000, can measure temperature over distances of up to 50 km, making them suitable for monitoring pipelines, power cables, and large industrial facilities. Fiber type considerations: Multimode fibers are typically used for shorter ranges (up to 40 km), while single-mode fibers are preferred for longer distances up to 100 km in specialized DTS applications.

Factors Affecting Cable Length

Optical attenuation: Signal loss along the fiber limits the maximum distance over which accurate temperature readings can be obtained. High-quality single-mode fibers reduce attenuation for long-range applications. Spatial resolution: DTS systems can provide temperature readings with a resolution down to 1 meter, but higher resolution over longer distances may require more sensitive interrogators.

Environmental conditions: Temperature extremes, mechanical stress, and installation conditions can affect the effective sensing length and accuracy. System design: The choice of Raman or Brillouin scattering-based DTS, laser pulse power, and backscatter detection method influences the maximum deployable length.

Applications

Industrial monitoring: Pipelines, power cables, storage tanks, and chemical plants. Fire detection: Continuous monitoring along cable runs in tunnels, buildings, or industrial facilities. Preventive maintenance: Detecting hotspots or abnormal temperature changes over long distances.

In summary, temperature-sensing optical cables in DTS systems are highly versatile, with lengths ranging from a few kilometers for localized monitoring to tens of kilometers for large-scale industrial applications, while maintaining high spatial resolution and accuracy.

Length of temperature-sensing optical cable

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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