A Novel Temperature-Insensitive Hydrostatic Liquid-Level Sensor Using Chirped FBG

• Main Authors: Vorathin, E., Z. M., Hafizi, A. M., Aizzuddin, M. K. A., Zaini, K. S., Lim
• Format: Article
• Language: English
• Published: IEEE 2019
• Subjects: TJ Mechanical engineering and machinery
• Online Access: http://umpir.ump.edu.my/id/eprint/23571/1/A%20Novel%20Temperature-Insensitive%20Hydrostatic%20Liquid-Level%20Sensor%20Using%20Chirped%20FBG1.pdf; http://umpir.ump.edu.my/id/eprint/23571/; https://doi.org/10.1109/JSEN.2018.2875532; https://doi.org/10.1109/JSEN.2018.2875532
• Institution: Universiti Malaysia Pahang

A novel half-bonded chirped fiber Bragg grating on a natural rubber diaphragm has been proposed to enhance the sensitivity and to compensate the temperature effects of a hydrostatic liquid-level sensor. This innovative fabrication method is resulted in the narrowing of the bandwidth with the hydrostatic pressure sensitivity recorded at −253 pm/kPa and water column sensitivity at −0.0253 nm/cm. The bandwidth modulation measurement was insensitive to temperature variations when compared with center wavelength modulation measurement. Furthermore, the proposed hydrostatic liquid-level sensor is compatible with a low-cost photodetector.