Fiber Bragg grating (FBG) sensing optical cables typically range from $50 to several hundred dollars per sensor, with full multi-point arrays costing several thousand dollars depending on configuration and packaging.

Pricing Overview

The cost of an FBG sensing cable depends on several factors:

• Sensor Type and Packaging: Bare fiber FBG sensors are the most economical, often starting around $50–$100 per sensor, while packaged sensors with protective housings for industrial or harsh environments can cost $200–$500 per sensor .
• Measurement Range: Standard temperature sensors (-40°C to 300°C) are moderately priced, whereas high-temperature variants (400°C–800°C) require specialized coatings and can significantly increase cost .
• Strain and Structural Sensors: FBG strain sensors for structural monitoring, such as bridges or wind turbines, often include temperature compensation and specialized packaging, which can raise the price compared to simple temperature sensors .
• Multi-Point Arrays: Deploying multiple FBG sensors along a single fiber reduces the per-sensor cost. Arrays of 8, 16, or 32 sensors are common, with total system costs ranging from $1,000 to $5,000 or more, depending on the number of sensors and the interrogator system used .
• Interrogator Costs: FBG cables require a fiber optic interrogator to read the signals, which typically represents 50–70% of the total system cost .

Additional Considerations

• Cable Length and Fiber Type: Longer cables or specialty fibers (e.g., chirped or phase-shifted gratings) can increase cost.
• Environmental Protection: Cables designed for outdoor, underwater, or high-vibration environments may include additional protective coatings or housings, further increasing price .
• Supplier and Customization: Prices vary by manufacturer and the level of customization required, such as specific wavelength ranges, grating spacing, or dual FBG designs for temperature compensation . In summary, a single-point FBG sensor cable may cost $50–$500, while multi-point FBG arrays with interrogators can reach several thousand dollars. For precise pricing, contacting suppliers like AtGrating, Technica, or DK Photonics with your specific requirements is recommended .