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Related Experiment Video

Updated: May 13, 2026

Multicolor Fluorescence Detection for Droplet Microfluidics Using Optical Fibers

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Published on: May 5, 2016

Optical Fiber Sensor with a Hydrophobic Filter Layer for Monitoring Hydrogen under Humid Conditions.

Daejin Kim^1,2, Alexander Shumski^1,2, Krista K Bullard^1,2

¹National Energy Technology Laboratory, 626 Cochran Mill Road, Pittsburgh, Pennsylvania 15236, United States.

|June 24, 2025

Summary

A new hydrophobic filter improves optical fiber hydrogen sensors for accurate monitoring in humid underground storage. This enhances safety and reliability for hydrogen energy infrastructure.

Keywords:

high humidity hydrogen sensor hydrophobic filter layer optical fiber subsurface hydrogen storage

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Last Updated: May 13, 2026

Multicolor Fluorescence Detection for Droplet Microfluidics Using Optical Fibers

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Published on: May 5, 2016

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Published on: November 7, 2016

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

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Published on: January 7, 2019

Area of Science:

Materials Science
Sensor Technology
Chemical Engineering

Background:

Real-time monitoring of hydrogen concentration is vital for underground hydrogen storage safety.
High humidity in storage environments significantly degrades hydrogen sensor accuracy.
Existing sensors face challenges with baseline drift and signal loss in humid conditions.

Purpose of the Study:

To develop a robust hydrogen sensor system for reliable monitoring in high-humidity underground storage.
To mitigate the impact of moisture on optical fiber hydrogen sensor performance.
To enhance the safety and integrity of hydrogen storage facilities through improved sensing technology.

Main Methods:

Fabrication of an optical fiber hydrogen sensor.
Coating the sensor with a hydrophobic filter layer over the sensing layer.
Testing sensor performance under high humidity conditions (99% RH).
Evaluating sensor reliability, baseline drift, and transmission intensity.

Main Results:

The hydrophobic filter layer significantly improved sensor reliability in 99% RH environments.
The modified sensor exhibited minimal baseline drift.
No severe reduction in transmission intensity was observed.
The sensor demonstrated enhanced performance for hydrogen detection under humid conditions.

Conclusions:

The hydrophobic filter-coated optical fiber hydrogen sensor enables accurate real-time monitoring in high-humidity environments.
This technology is suitable for subsurface hydrogen storage applications.
The improved sensor contributes to the safe and efficient operation of hydrogen storage facilities.