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"The need for very stable measurements over long time periods as well as immunity to lightning were two key reasons for using the NI PXIe-4844 optical sensor interrogator and FBG sensors."
- Dr. Alfredo
Cigada
- Politecnico di Milano
Read the full case study
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Many test and measurement applications have environmental or physical constraints that make the use of electrical sensors unsafe, impractical, or unusable. Fortunately, the inherent characteristics of fiber Bragg grating (FBG) optic sensors address or eliminate the majority of these concerns. Using light instead of electricity and glass fiber instead of copper wire, the sensors are nonconductive, electrically and chemically passive, and immune to electromagnetic interference. They use the same fiber as the telecommunications industry, so they can transmit data from multiple daisy-chained sensors over long distances with minimal signal loss.
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NI PXI Express Optical Sensor Interrogator
The NI PXI Express optical sensor interrogator combines a high-accuracy optical core with the modular PXI form factor to deliver unprecedented performance and flexibility in a rugged 3U chassis.
- 4 optical channels, 10 Hz full spectrum scan
- Daisy chain dozens of sensors on a single fiber over long distances (over 10 km)
- No external calibration required with NIST-traceable reference
- NI-OSI Explorer for automatic sensor detection and configuration
Configure your optical sensor system
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Fiber Bragg Grating (FBG) Optical Sensor Vendors
FBG sensors overcome many of the challenges associated with electrical sensors while offering similar functionality. From concrete embeddable strain gages to glue-on temperature sensors, you can find the right sensor for your application.
Learn more about featured FBG Optical Sensor Vendors
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Optical Sensing System Setup
Despite the ubiquity of electrical sensors, their usage is impractical, if not entirely impossible, in certain types of applications. Fiber-optic sensors offer an excellent solution to these problems. Fundamentally, fiber-optic sensors work like their electrical counterparts, but use light instead of electricity and glass fiber instead of copper wire. Where an electrical sensor might modulate electrical properties like current, resistance, or voltage, a fiber-optic sensor modulates properties of light including intensity, phase, polarization, or wavelength. Learn the basics of highly differentiated FBG sensors, as well as available form factors and sensor types.
Learn how to selecct and set up your optical sensing system
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