Posted in | News | Optics and Photonics

New Optical Sensor Interrogator Unveiled by National Instruments

National Instruments has rolled out the new NI PXIe-4844 optical sensor interrogator that is suitable for applications such as monitoring and testing aircraft components, rail vehicles and marine vessels. The interrogator can also be used for monitoring nuclear reactors, pipelines, wind turbine blades, and other energy related devices.

Fiber Bragg Grating

The NI PXIe-4844 interrogator is a two-slot 3U PXI Express unit that is used for fiber Bragg grating (FBG) sensors. The FBG sensors are not prone to electromagnetic interference, are electrically passive, and they do not conduct electricity. These sensors transmit light by using a standard optical fiber, enabling measurements to be taken over a maximum of 10 km. Scientists and engineers can utilize the FBG sensors for measuring pressure, temperature, and strain.

The optical sensor interrogator includes four optical channels, which are concurrently measured at 10 Hz. Each channel has a wavelength range of 80 nm that has the ability to scan more than 20 FBG sensors for every channel. The optical core of the interrogator combines Micron Optics’ fiber Fabry-Perot tunable filter technology with the low-noise, high-power swept wavelength laser. The interrogator provides a wavelength stability, repeatability and accuracy of 1 pm. The NI PXIe-4844 interrogator does not need regular external calibration, because every scan is calibrated to a wavelength reference that is NIST-traceable.

The interrogator also features the NI-OSI Explorer utility to offer simplified sensor configuration and automatic detection of sensors. It also includes the NI-OSI driver software with a user-friendly LabVIEW API, for obtaining measurements in physical units.



Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    National Instruments. (2019, February 28). New Optical Sensor Interrogator Unveiled by National Instruments. AZoOptics. Retrieved on May 17, 2024 from

  • MLA

    National Instruments. "New Optical Sensor Interrogator Unveiled by National Instruments". AZoOptics. 17 May 2024. <>.

  • Chicago

    National Instruments. "New Optical Sensor Interrogator Unveiled by National Instruments". AZoOptics. (accessed May 17, 2024).

  • Harvard

    National Instruments. 2019. New Optical Sensor Interrogator Unveiled by National Instruments. AZoOptics, viewed 17 May 2024,

Tell Us What You Think

Do you have a review, update or anything you would like to add to this news story?

Leave your feedback
Your comment type

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.