High relative humidity measurements using gelatin coated long-period grating sensors

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High relative humidity measurements using gelatin coated long-period grating sensors

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dc.contributor.author Tan, Khay Ming
dc.contributor.author Tay, Chia Meng
dc.contributor.author Tjin, Swee Chuan
dc.contributor.author Chan, Chi Chiu
dc.contributor.author Rahardjo, Harianto
dc.date.accessioned 2011-12-06T08:39:35Z
dc.date.available 2011-12-06T08:39:35Z
dc.date.copyright 2005
dc.date.issued 2011-12-06
dc.identifier.citation Tan, K. M., Tay, C. M., Tjin, S. C., Chan, C. C., & Rahardjo, H. (2005). High Relative Humidity Measurements using Gelatin Coated Long-Period Grating Sensors. Sensors and Actuators B: Chemical, 110(2), 335-341.
dc.identifier.uri http://hdl.handle.net/10220/7337
dc.description.abstract A long-period grating (LPG) coated with gelatin was developed as a high relative humidity (RH) sensor. The resonance dip or coupling strength of the LPG spectrum varies with RH. Experimental investigations on the sensor yield a sensitivity of 0.833%RH/dB with an accuracy of ±0.25%RH, and a resolution of ±0.00833%RH. The LPG RH sensor also offers repeatability, hysteresis and stability errors of less than ±0.877, ±0.203 and ±0.04%RH, respectively. In addition to the characterization of the LPG RH sensor, further studies were conducted to determine the effect of grating periodicities on the sensitivity of the sensor. Results show that higher order cladding modes from smaller grating periods enable the sensor to achieve higher sensitivity to humidity. This method is proposed to be more cost effective as compared to more complex spectroscopic methods based on wavelength detection. This sensor can also help to solve problems in measuring high humidity with existing relative humidity measurement systems.
dc.language.iso en
dc.relation.ispartofseries Sensors and actuators B: chemical
dc.rights © 2005 Elsevier Ltd.
dc.subject DRNTU::Engineering::Civil engineering::Geotechnical
dc.subject DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
dc.title High relative humidity measurements using gelatin coated long-period grating sensors
dc.type Journal Article
dc.contributor.school School of Civil and Environmental Engineering
dc.identifier.doi http://dx.doi.org/10.1016/j.snb.2005.02.012
dc.description.version Accepted version

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