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Advantages
l Rugged package protection
l Stable and accurate detection signal
l Fast, simple, permanent installation
l Multiplexing and multiaccess capabilities reducing cabling configuration
l Ideal remote and long-term sensing ability
l Combinable with other WASAN-series sensors
l Double ended design support sensor array
l Supportable for both positive and negative strain measurements
Applications
l Suited for harsh environments such as structural health monitoring in large civil engineering (such as bridge, tunnel and integrated pipe gallery) and heaven duty machinery
l Applicable for health monitoring in petroleum, chemical and metallurgical industries
Description
The WASAN-OFS-S01 is a rugged strain sensor based on optical Fiber Bragg Grating (FBG) sensing technology. It can achieve temperature compensation with integrated temperature sensing FBG, which makes it qualified for reliable and accurate strain measurement in harsh environments.
With a high-strength steel package this sensor possesses excellent mechanical properties to ensure enhanced fatigue resistance. The WASAN-OFS-S01 includes a second FBG which provides active temperature compensation, which enables absolute and accurate strain measurement. WASAN-series sensors employ the unique optical device packaging method to ensure the long-term sensing stability and the ability to measure both positive and negative strains.
The sensors can be pre-embedded in the pouring concrete structure or installed on the surface of the measured structure by anchor bolt in just a few minutes. Armored cables make both installation and fiber protection fast and easy during concrete pouring and solidification.
The WASAN-OFS-S01 can be used alone or in series as a part of an FBG array. Double ended design and low bending loss support multiplexing of many sensors on one single fiber even if kilometers apart. Installation of such arrays will be more economical and maintainable for large measurement networks.
Rugged Strain Sensor (WASAN-OFS-S01)
Specifications | OFS-S01 |
Performance Properties | |
Sensitivity | 1.2 pm/με |
Resolution | Typical 0.1 με (Related to demodulator resolution) |
Measurement range | ±1500 με |
Accuracy | ±5 με (Related to demodulator accuracy) |
Repeatability | ±3 με (Related to demodulator accuracy) |
Temperature compensation error | ±5 pm (Related to demodulator accuracy) |
Physical Properties | |
Dimensions | Largest part of the main body is 146.5±2 × Φ28 mm |
Shell Material | Alloy Steel |
Fiber Type | Single mode fiber |
Cable Type | Φ5 mm armored optical cable |
Connectorization | FC/APC or fusing |
Cable Bend Radius | 5 cm |
Fiber core and coating diameter | Concrete buried |
Optical Properties | |
Peak Reflectivity (Rmax) | > 90 % |
FWHM (-3 dB point) | 0.25 nm |
Notes:
1. The typical initial wavelength of the FBG sensor is from 1528.00nm to 1605.00nm.
2. To achieve measurement accuracy as presented in this datasheet, the sensor should be used with the high-speed interrogator WASAN-OSI-16.
3. For special coating FBG please contact wasan@wasan.mo
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