Temperature measuring optical cables, such as distributed temperature sensing (DTS) fiber optic cables, typically range from $500 per sensor to $30,000 for complete systems, depending on technology, length, and application requirements.

Price Ranges by Technology

1. Fluorescent Fiber Optic Sensors These sensors measure temperature at specific points using fluorescence decay. Individual sensors generally cost $500 to $2,000, with custom or high-precision models exceeding this range .
2. Fiber Bragg Grating (FBG) Sensors FBG sensors provide multi-point temperature monitoring along a single fiber. Individual FBG sensors cost $500 to $2,000, while complete systems with multiple sensors and demodulation equipment can range from $10,000 to $30,000 .
3. Distributed Temperature Sensing (DTS) Cables DTS cables allow continuous temperature measurement along the entire fiber length, ideal for long-distance monitoring. These systems are high-end, with substantial equipment investment, but they provide extensive coverage and high precision (less than 1°C) over long distances .

Factors Affecting Cost

• Accuracy and Stability: High-accuracy sensors (±0.1°C) can cost 3–5 times more than standard accuracy sensors (±1.0°C) due to precision requirements .
• Temperature Range: Sensors designed for extreme temperatures (-270°C to +600°C) are more expensive than standard industrial ranges (-40°C to +150°C), .
• Cable Length and Spatial Resolution: Longer cables and higher spatial resolution increase cost, especially for DTS systems .
• Environmental Protection: Armored or low-smoke zero-halogen jackets, ruggedized housings, and compliance with safety standards add to the price .
• System Components: Complete systems include interrogation units, data acquisition, and installation, which significantly increase total cost .

Typical Applications

• Industrial monitoring in tunnels, bridges, and power cable systems
• Fire detection and safety monitoring in coal mines and petrochemical pipelines
• Long-distance pipeline and power cable temperature monitoring
• Critical infrastructure in harsh environments where conventional sensors are unsuitable In summary, the cost of temperature measuring optical cables varies widely depending on the technology, system complexity, and application requirements. For localized measurements, individual sensors may cost a few hundred dollars, while full DTS systems for long-distance monitoring can reach tens of thousands of dollars.