Distributed temperature sensing

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.

 How DTS works 
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.

 Applications of DTS 
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.

 Advantages of DTS 
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.  

 Related Technologies 
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.  

 References 



Category:Sensors