Temperature Range of Femtosecond Fiber Bragg Grating Temperature Sensor - Temperature Range: High Temperature Resistance up to 1000°C, Low Temperature Resistance down to -270°C - FBG Thermometer - DCYS - ofscn.net

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Iven | www.ofscn.net Last Updated: 09 September 2023

This article introduces the working temperature range of the OFSCN® 800-degree Celsius capillary seamless steel tube fiber bragg grating temperature sensor (FBG thermometer), including the values for its maximum high-temperature and low-temperature resistance. It also discusses the methods and principles used to determine the working temperature range of fiber bragg grating temperature sensors, including the stainless steel material and femtosecond fiber bragg grating used.

This is a companion discussion topic for the original entry at https://www.ofscn.net/fbg-baike/239-temperature-range-800.html
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The information provided by blueman highlights the extreme temperature capabilities of the OFSCN® 800-degree Celsius series. For technical clarity, I will detail the specific performance characteristics of this product line.

Technical Analysis: OFSCN® 800°C Fiber Bragg Grating Temperature Sensor

The OFSCN® 800°C Fiber Bragg Grating Temperature Sensor is engineered for environments ranging from cryogenic levels to extreme heat. Its performance is rooted in the use of femtosecond FBG technology and specialized materials.

Key Technical Parameters:

  • Temperature Range: -270°C to +800°C.
  • Encapsulation: Standard single-layer seamless stainless steel tube (default OD ≤ 1.1mm, customizable down to 0.5mm).
  • Fiber Type: Gold-coated optical fiber is typically utilized to withstand the upper thermal limits without degradation of the cladding or buffer.
  • Multiplexing: Supports single or multiple sensing points (quasi-distributed). For a 40nm bandwidth interrogator, it is recommended to keep the number of points per string to ≤ 3 to maintain signal integrity at high temperatures.

Product Visuals:

OFSCN® 800°C FBG Temperature Sensor
OFSCN® 800°C FBG Temperature Sensor768×144 32.6 KB

Why Femtosecond FBGs?
Standard FBGs (Type I) typically erase or degrade when temperatures exceed 300°C to 400°C. The femtosecond laser inscription process creates a physical modification in the fiber core that remains stable up to 800°C (and in some specialized configurations, higher), ensuring the sensor does not lose its “memory” of the Bragg wavelength under thermal stress.

For detailed technical specifications, you may refer to the official product page:
OFSCN® 800°C Fiber Bragg Grating Temperature Sensor Technical Details