Distributed temperature sensing

Template:Infobox technology

Distributed Temperature Sensing (DTS) is a technology that uses **fiber optic cables** to measure temperature along the entire length of the fiber. It provides **continuous, real-time temperature monitoring** for industrial, environmental, and safety applications.

DTS systems use **Raman scattering** in optical fibers to measure temperature changes. The system sends laser pulses through the fiber, and light scatters back in two different wavelengths: - **Stokes signal:** Temperature-dependent - **Anti-Stokes signal:** Changes in intensity based on temperature variations

By analyzing these signals, the system can determine **precise temperature values** at different points along the fiber.

DTS is widely used in various industries, including: ✔ **Oil & Gas Pipelines:** Detecting leaks and monitoring pipeline integrity. ✔ **Power Cables & Electrical Grids:** Preventing overheating and failures. ✔ **Fire Detection:** Identifying early signs of fire in tunnels and large structures. ✔ **Geothermal & Environmental Monitoring:** Measuring temperature variations underground. ✔ **Industrial Processes:** Controlling temperature in chemical and manufacturing plants.

- **Long-range temperature sensing** (up to several kilometers). - **Continuous real-time monitoring** along the entire fiber. - **Immune to electromagnetic interference**, unlike electrical sensors. - **Uses existing fiber optic infrastructure**, reducing installation costs.

DTS is part of a larger group of **fiber optic sensing technologies**, including: - Distributed Acoustic Sensing (DAS) – Uses fiber optics to detect sound and vibration.

• ^[1]
• ^[2]
• ^[3]

• Distributed Acoustic Sensing (DAS)
• Fiber Optic Sensors
• Temperature Sensors

1. ↑ Hartog, A. (2017). An Introduction to Distributed Optical Fibre Sensing. CRC Press. ISBN 978-1-138-03024-4.
2. ↑ Fidan, U.; Gök, T. (2020). "Distributed Temperature Sensing for Fire Detection". Journal of Optical Sensors. 15: 101–110. doi:10.1016/j.opticsen.2020.05.007.{{cite journal}}: CS1 maint: multiple names: authors list (link)
3. ↑ "Distributed Temperature Sensing: Applications and Technologies". FOTAS. Retrieved 2025-03-14.