Review of optical humidity sensors

X Rao, L Zhao, L Xu, Y Wang, K Liu, Y Wang, GY Chen… - Sensors, 2021 - mdpi.com
Optical humidity sensors have evolved through decades of research and development,
constantly adapting to new demands and challenges. The continuous growth is supported …

Fibre-optic sensor technologies for humidity and moisture measurement

TL Yeo, T Sun, KTV Grattan - Sensors and Actuators A: Physical, 2008 - Elsevier
A review of the use of fibre-optic sensor technologies for humidity sensing is presented. The
paper first provides a brief overview on the basic concept of what is meant by humidity and …

Simultaneous measurement of humidity and temperature based on a partially coated optical fiber long period grating

A Urrutia, J Goicoechea, AL Ricchiuti, D Barrera… - Sensors and Actuators B …, 2016 - Elsevier
A humidity and temperature optical fiber sensor based on a long-period grating (LPG), which
can provide simultaneous response to both magnitudes, is proposed and demonstrated via …

An evanescent-wave optical fiber relative humidity sensor with enhanced sensitivity

SK Khijwania, KL Srinivasan, JP Singh - Sensors and Actuators B …, 2005 - Elsevier
We report a fiber optic relative humidity (RH) sensor based on the evanescent wave
absorption spectroscopy using a single U-bend plastic-clad silica fiber with high dynamic …

Fiber optic gas sensors based on lossy mode resonances and sensing materials used therefor: A comprehensive review

I Vitoria, C Ruiz Zamarreño, A Ozcariz, IR Matias - Sensors, 2021 - mdpi.com
Pollution in cities induces harmful effects on human health, which continuously increases
the global demand of gas sensors for air quality control and monitoring. In the same manner …

Role of morphological structure, doping, and coating of different materials in the sensing characteristics of humidity sensors

A Tripathy, S Pramanik, J Cho, J Santhosh… - Sensors, 2014 - mdpi.com
The humidity sensing characteristics of different sensing materials are important properties
in order to monitor different products or events in a wide range of industrial sectors, research …

Optical fiber relative humidity sensor based on a FBG with a di-ureasil coating

SFH Correia, P Antunes, E Pecoraro, PP Lima… - Sensors, 2012 - mdpi.com
In this work we proposed a relative humidity (RH) sensor based on a Bragg grating written in
an optical fiber, associated with a coating of organo-silica hybrid material prepared by the …

Optical Fiber Sensors Based on Nanoparticle‐Embedded Coatings

A Urrutia, J Goicoechea, FJ Arregui - Journal of Sensors, 2015 - Wiley Online Library
The use of nanoparticles (NPs) in scientific applications has attracted the attention of many
researchers in the last few years. The use of NPs can help researchers to tune the physical …

Simultaneous measurement of relative humidity and temperature based on forward Brillouin scattering in polyimide-overlaid fiber

Y Xu, X Zhao, Y Li, Z Qin, Y Pang, Z Liu - Sensors and Actuators B …, 2021 - Elsevier
A polyimide-overlaid single mode fiber is used to realize simultaneous measurement of
relative humidity (RH) and temperature based on the forward Brillouin scattering (FBS) in the …

Long period grating-based humidity sensor for potential structural health monitoring

T Venugopalan, T Sun, KTV Grattan - Sensors and Actuators A: Physical, 2008 - Elsevier
This paper reports the work on the development of novel humidity sensors using long period
grating (LPG) technology in an optical fibre. The sensors are created through coating a thin …