Contact Us

Products - UW-FBG Sensors

Ultra-Weak Fiber Bragg Grating Sensor Arrays for Distributed Sensing — Long-distance, high-density monitoring for strain, temperature, and vibration in civil engineering, energy, and industrial applications

Request a Quote View Datasheets
Products › 📌 UW-FBG Products

Product Models

From standard strain sensing to specialized applications — comprehensive UW-FBG sensor solutions for every requirement

RS-UWFBG-S1 RS-UWFBG-S2 RS-UWFBG-S3 RS-UWFBG-S4 RS-UWFBG-S5
Strain Model 1
Strain Model 2
Strain Model 3
Strain Model 4
Strain Model 5

RS-UWFBG-S1

ɸ 250 μm · Acrylate Coating

Standard weak grating array using automated tower inscription process. Excellent for distributed strain sensing and structural deformation monitoring with up to 10,000 με strain range.

  • Fiber Diameter245 μm ±5 μm
  • Operating Temp-20°C ~ 90°C
  • Reflectivity0.01% ~ 0.1%
  • Strain Range> 10,000 με
  • Temp Sensitivity10.02 pm/°C
  • Strain Sensitivity1.2 pm/με
Applications: Distributed strain sensing, structural deformation monitoring, high-precision chain temperature sensing

RS-UWFBG-S2

ɸ 165 μm / 900 μm · Ormocer Coating

High-temperature resistant weak grating array using femtosecond laser inscription. Exceptional temperature range of -200°C to +300°C for extreme environments.

  • Fiber Diameter195 μm (900 μm optional)
  • Operating Temp-200°C ~ +300°C
  • Reflectivity0.01%
  • CoatingOrmocer
  • Temp Sensitivity10.8 pm/°C
  • Strain Sensitivity1.21 pm/με
Applications: Extreme high/low temperature measurement, large-scale distributed strain sensing

RS-UWFBG-S3

ɸ 165 μm · Special Polyimide Coating

Humidity-sensitive weak grating array with special polyimide coating. High sensitivity 4.6 pm/%RH for large-scale, multi-point humidity testing in bridge cables and special environments.

  • Center Wavelength1528~1568 nm
  • Humidity Sensitivity4.6 pm/%RH @ 30°C
  • Fiber Diameter165 μm ±5 μm
  • Operating Temp-20°C ~ 60°C
Applications: Bridge cable internal humidity measurement, special environment humidity testing

RS-UWFBG-S4

ɸ 900 μm · Acrylate/Hytrel

Tight-buffer design with strain range > 20,000 με. Can be directly bonded to structure surfaces or processed into various sensing cables.

  • Center Wavelength1528~1568 nm
  • Fiber Diameter900 μm
  • Strain Range> 20,000 με
  • Operating Temp-20°C ~ 90°C
Applications: Concrete structure surface strain, metal structure monitoring, tunnel wall displacement

RS-UWFBG-S5

ɸ 2.0 mm · TPU Coating

TPU coating with large strain range > 20,000 με. Suitable for structural surface pre-tension installation or groove embedding.

  • Center Wavelength1528~1568 nm
  • Fiber Diameter2.0 mm (TPU)
  • Strain Range> 20,000 με
  • Operating Temp-20°C ~ 90°C
Applications: Structural surface strain, crack monitoring, distributed strain cable manufacturing
RS-UWFBG-D1 RS-UWFBG-D2
DAS Model 1
DAS Model 2

RS-UWFBG-D1

ɸ 250 μm · Bandwidth ≥ 4.9 nm @3dB

Distributed Acoustic Sensing (DAS) weak grating array. Significantly improves DAS signal-to-noise ratio compared to standard fiber, enabling long-range acoustic event detection.

  • Center Wavelength1550.12 nm
  • Bandwidth@3dB≥ 4.9 nm (G.652D)
  • Fiber CoatingAcrylate / Modified Acrylate
  • Operating Temp-40°C ~ 120°C
  • Typical Spacing2m, 5m (1m~50m)
Applications: DAS sensing systems, oil well logging, pipeline leak detection, perimeter security

RS-UWFBG-D2

ɸ 165 μm · G.657A2 Fiber

Fine-diameter DAS weak grating array with high acoustic sensitivity and excellent bending performance. Reduces cable processing and construction loss.

  • Center Wavelength1550.12 nm
  • Bandwidth@3dB≥ 5 nm
  • Fiber CoatingAcrylate / Modified Acrylate
  • Fiber TypeG.657A2
  • Typical Spacing2m, 5m (1m~50m)
Applications: Distributed DAS sensing, underwater acoustic monitoring, VSP vibration sensors
RS-UWFBG-R1 RS-UWFBG-R2 RS-UWFBG-R3
Reinf Model 1
Reinf Model 2
Reinf Model 3

RS-UWFBG-R1

GFRP · 1.0 mm / 2.0 mm

Glass Fiber Reinforced Polymer smart reinforcement. Available in 1.0mm and 2.0mm diameters with high mechanical strength for structural surface bonding.

  • Cable Diameter1.0 mm / 2.0 mm
  • Operating Temp-20°C ~ 120°C
  • Tensile Strength≥ 500 N (1.0mm)
  • Temp Sensitivity17.86 pm/°C
  • Strain Sensitivity1.18 pm/με
Applications: Structure surface strain monitoring, deformation sensing experiments

RS-UWFBG-R2

CFRP · 5.0 mm / 7.0 mm

Carbon Fiber Reinforced Polymer smart reinforcement bar. Excellent mechanical strength ≥2100 MPa and thermal stability for bridge cables and anchor monitoring.

  • Center Wavelength1528~1568 nm
  • Cable Diameter5.0 mm / 7.0 mm
  • Tensile Strength≥ 2100 MPa
  • Elastic Modulus≥ 110 GPa
Applications: Bridge cable monitoring, anchor monitoring, structural reinforcement

RS-UWFBG-R3

CFRP Strip · 30 mm × 1.2 mm

Carbon Fiber Reinforced Polymer strip sensor. Excellent for bridge reinforcement and structural health monitoring with long service life and high tensile strength.

  • Center Wavelength1528~1568 nm
  • Strip Size30 mm × 1.2 mm
  • Tensile Strength≥ 2100 MPa
  • Elastic Modulus≥ 110 GPa
Applications: Bridge reinforcement, anchor bolts, structural monitoring

Technical Specifications

Complete specifications for all UW-FBG sensor models

Download Datasheets (PDF)
ParameterSpecification
Center Wavelength1528 nm ~ 1568 nm
Wavelength Accuracy±0.5 nm
Reflectivity0.01%~0.1%
Grating Length10 mm
Bandwidth@-3dB≤0.30 nm
Side Mode Suppression Ratio≥15 dB
Fiber Attenuation≤0.30 dB/km
Typical Grating Spacing0.2m, 0.5m, 1m, 2m, 5m
Fiber CoatingAcrylate / Polyimide
Fiber Diameter245 μm ±5 μm
Break Tensile Load≥20 N
Operating Temperature-20°C ~ 90°C
Temperature Sensitivity10.02 pm/°C
Strain Sensitivity1.2 pm/με
ParameterSpecification
Center Wavelength1528 nm ~ 1568 nm
Wavelength Accuracy±0.5 nm
Grating Length4 mm
Reflectivity0.01%
Bandwidth@-3dB≤0.30 nm
Fiber CoatingOrmocer
Fiber Diameter195 μm (900 μm optional)
Break Tensile Load≥30 N
Operating Temperature-200°C ~ +300°C
Temperature Sensitivity10.8 pm/°C
Strain Sensitivity1.21 pm/με
ParameterSpecification
Center Wavelength1528 nm ~ 1568 nm
Wavelength Accuracy±0.5 nm
Grating Length10 mm
Reflectivity0.01% ~ 0.1%
Bandwidth@-3dB≤0.30 nm
Side Mode Suppression Ratio≥15 dB
Fiber Attenuation≤0.5 dB
Typical Grating Spacing0.2m, 0.5m, 1m, 2m, 5m
Fiber CoatingSpecial Polyimide
Fiber Diameter165 μm ±5 μm
Break Tensile Load≥10 N
Operating Temperature-20°C ~ 60°C
Temperature Sensitivity12.10 pm/°C @ 55% RH
Humidity Sensitivity4.6 pm/%RH @ 30°C
ParameterSpecification
Center Wavelength1528 nm ~ 1568 nm
Wavelength Accuracy±0.5 nm
Grating Length10 mm
Reflectivity0.01% ~ 0.1%
Bandwidth@-3dB≤0.30 nm
Side Mode Suppression Ratio≥15 dB
Fiber Attenuation≤0.30 dB/km
Typical Grating Spacing0.2m, 0.5m, 1m, 2m, 5m
Fiber CoatingAcrylate / Hytrel
Fiber Diameter900 μm
Break Tensile Load≥50 N
Operating Temperature-20°C ~ 90°C
Strain Sensitivity1.2 pm/με
Strain Range> 20,000 με
ParameterSpecification
Center Wavelength1528 nm ~ 1568 nm
Wavelength Accuracy±0.5 nm
Grating Length10 mm
Reflectivity0.01% ~ 0.1%
Bandwidth@-3dB≤0.30 nm
Side Mode Suppression Ratio≥15 dB
Fiber Attenuation≤0.30 dB/km
Typical Grating Spacing0.2m, 0.5m, 1m, 2m, 5m
Fiber CoatingAcrylate / Hytrel / TPU
Fiber Diameter2.0 mm
Break Tensile Load≥50 N
Operating Temperature-20°C ~ 90°C
Strain Sensitivity1.2 pm/με
Strain Range> 20,000 με
ParameterSpecification
Center Wavelength1550.12 nm
Grating Length10 mm
Reflectivity0.01% ~ 0.05%
Bandwidth@-3dB≥4.9 nm (G.652D) / ≥22 nm (G.657A2)
Side Mode Suppression Ratio≥15 dB
Fiber Attenuation≤0.30 dB/km
Fiber CoatingAcrylate / Modified Acrylate
Fiber Diameter250 μm ±5 μm
Break Tensile Load≥30 N (3% strain)
Operating Temperature-40°C ~ 120°C
Typical Grating Spacing2m, 5m (1m~50m customizable)
Temperature Sensitivity10.02 pm/°C
ParameterSpecification
Center Wavelength1550.12 nm
Grating Length10 mm
Reflectivity0.01%
Bandwidth@-3dB≥5 nm
Side Mode Suppression Ratio≥15 dB
Fiber Attenuation≤0.30 dB/km
Fiber CoatingAcrylate / Modified Acrylate
Fiber TypeG.657A2
Fiber Diameter165 μm ±5 μm
Break Tensile Load≥20 N (2% strain)
Operating Temperature-20°C ~ 150°C
Typical Grating Spacing2m, 5m (1m~50m customizable)
Temperature Sensitivity10.02 pm/°C
ParameterSpecification
Center Wavelength1528 nm ~ 1568 nm
Wavelength Accuracy±0.5 nm
Grating Length10 mm
Reflectivity0.01% ~ 0.1%
Bandwidth@-3dB≤0.50 nm
Side Mode Suppression Ratio≥15 dB
Fiber Attenuation≤0.4 dB/km
Typical Grating Spacing0.2m, 0.5m, 1m, 2m, 5m
Cable Weight8 kg/km (1.0mm) / 16 kg/km (2.0mm)
Cable Diameter1.0 mm / 2.0 mm
Tensile Strength≥500 N (1.0mm) / ≥1000 N (2.0mm)
Operating Temperature-20°C ~ 120°C
Temperature Sensitivity17.86 pm/°C
Strain Sensitivity1.18 pm/με
ParameterSpecification
Center Wavelength1528 nm ~ 1568 nm
Wavelength Accuracy±0.5 nm
Grating Length10 mm
Reflectivity0.01% ~ 0.1%
Bandwidth@-3dB≤0.50 nm
Side Mode Suppression Ratio≥15 dB
Fiber Attenuation≤0.4 dB/km
Typical Grating Spacing0.2m, 0.5m, 1m, 2m, 5m
Cable Weight16 kg/km (5.0mm)
Cable Diameter5.0 mm / 7.0 mm
Elastic Modulus≥110 GPa
Elongation at Break≥1.5%
Tensile Strength≥2100 MPa
Operating Temperature-20°C ~ 150°C
Temperature Sensitivity8.95 pm/°C
Strain Sensitivity1.21 pm/με
ParameterSpecification
Center Wavelength1528 nm ~ 1568 nm
Wavelength Accuracy±0.5 nm
Reflectivity0.01% ~ 0.1%
Bandwidth@-3dB≤0.50 nm
Side Mode Suppression Ratio≥15 dB
Fiber Attenuation≤0.4 dB/km
Typical Grating Spacing0.2m, 0.5m, 1m, 2m, 5m
Cable Weight20 kg/km
Strip Dimensions30 mm × 1.2 mm
Elastic Modulus≥110 GPa
Elongation at Break≥1.5%
Tensile Strength≥2100 MPa
Operating Temperature-20°C ~ 150°C
Temperature Sensitivity8.95 pm/°C
Strain Sensitivity1.21 pm/με

Our Solutions for Your Company

UW-FBG sensors are the sensing core of our complete monitoring solutions. Explore how we serve your industry.

Civil Infrastructure

Bridges, highways, tunnels, and dams — long-term structural health monitoring with distributed strain and temperature sensing.

Energy & Power

Power cables, wind turbines, and oil & gas pipelines — continuous monitoring to prevent failures and optimize operations.

Industrial & Manufacturing

Production equipment, industrial pipelines, and facility monitoring — precision measurement for process optimization and safety.

Railway & Transportation

High-speed rail, metro systems, and rail bridges — distributed acoustic sensing for train tracking and infrastructure safety.

Ready to Build Your Sensing System?

Talk to our engineers to design a UW-FBG sensing solution tailored to your application.

Talk to an Engineer