Fibre Grating-based Sensor Design for Humidity Measurement in Chemically Harsh Environment

Alwis, Lourdes S M; Sun, Tong; Grattan, Kenneth T V

Abstract

A temperature compensated Relative Humidity (RH) sensor incorporating Fibre Bragg Gratings (FBGs) has been developed to be tested in extremely harsh gaseous acidic environment. One FBG is coated with moisture sensitive polymer while the other was used for temperature compensation. The resonance wavelengths were chosen to be within suitable spectral bandwidths for efficient interpretation of both RH and temperature. The performance of the sensor was evaluated for use in challenging environment by trialing the sensors for over a month in a waste sewerage tank with highly acidic gaseous environment. The sensitivity of the sensor to RH/temperature is calculated to be 5 pm/%RH and 9 pm/̊C respectively

Citation

Alwis, L. S. M., Sun, T., & Grattan, K. T. V. (2016, September). Fibre Grating-based Sensor Design for Humidity Measurement in Chemically Harsh Environment. Presented at 30th anniversary Eurosensors Conference – Eurosensors 2016, Budapest, Hungary

• Presentation Conference Type: Conference Paper (published)
• Conference Name: 30th anniversary Eurosensors Conference – Eurosensors 2016
• Start Date: Sep 4, 2016
• End Date: Sep 7, 2016
• Online Publication Date: Jan 4, 2017
• Publication Date: 2016
• Deposit Date: Jan 10, 2017
• Publicly Available Date: Jun 28, 2023
• Journal: Procedia Engineering
• Print ISSN: 1877-7058
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 168
• Pages: 1317-1320
• DOI: https://doi.org/10.1016/j.proeng.2016.11.359
• Keywords: Fibre Bragg Grating sensor, humidity sensor,
• Public URL: http://researchrepository.napier.ac.uk/Output/460617