Abstract:
A liquid-level sensor using a gallium nitride (GaN) ultraviolet (UV) photodetector was successfully demonstrated. As the liquid level was changed, the intensity of UV lig...Show MoreMetadata
Abstract:
A liquid-level sensor using a gallium nitride (GaN) ultraviolet (UV) photodetector was successfully demonstrated. As the liquid level was changed, the intensity of UV light on the GaN surface was varied owing to the refraction of light on the liquid surface. For the fabrication of the liquid-level sensor, facile and rapid manufacturing was employed, involving metal wire bonding on the semiconductor surface. To characterize the fabricated sensor, the water level in the cylinder was measured according to the photocurrent change of the GaN UV photodetector. The responsivity of the liquid-level sensor depended on the diameter of the cylinder, applied voltage, and emission angle of the UV source. In particular, a cylinder diameter of 16 cm and an emission angle of 45° yielded a resolution of 0.05 cm up to the water level of 10 cm. The results of this study confirm the feasibility of liquid-level sensors for continuous and simultaneous liquid-level monitoring in harsh environments, including high-temperature plants, nuclear reactors, and chemical tanks.
Published in: IEEE Sensors Journal ( Volume: 20, Issue: 18, 15 September 2020)
Funding Agency:
Department of Mechanical Convergence Engineering, Hanyang University, Seoul, South Korea
Jaebum Sung received the B.S. degree from Hanyang University, South Korea, in 2019, where he is currently pursuing the M.S. and Ph.D. degrees with the Mechanical Engineering Department. His research interests include micro sensors for aeronautical applications, precision engineering, micromachining, and thin film deposition.
Jaebum Sung received the B.S. degree from Hanyang University, South Korea, in 2019, where he is currently pursuing the M.S. and Ph.D. degrees with the Mechanical Engineering Department. His research interests include micro sensors for aeronautical applications, precision engineering, micromachining, and thin film deposition.View more
Department of Mechanical Convergence Engineering, Hanyang University, Seoul, South Korea
Institute of Nano Science and Technology, Hanyang University, Seoul, South Korea
Hongyun So (Member, IEEE) received the B.S. degree from Hanyang University, South Korea, in 2009, the M.S. degree from KAIST, South Korea, in 2011, and the Ph.D. degree from the University of California, Berkeley, in 2014, all in mechanical engineering. He joined Stanford University, in 2015, as a Postdoctoral Scholar with the Aeronautics and Astronautics Department. He is currently an Assistant Professor with the Mechani...Show More
Hongyun So (Member, IEEE) received the B.S. degree from Hanyang University, South Korea, in 2009, the M.S. degree from KAIST, South Korea, in 2011, and the Ph.D. degree from the University of California, Berkeley, in 2014, all in mechanical engineering. He joined Stanford University, in 2015, as a Postdoctoral Scholar with the Aeronautics and Astronautics Department. He is currently an Assistant Professor with the Mechani...View more
Contents Department of Mechanical Convergence Engineering, Hanyang University, Seoul, South Korea
Jaebum Sung received the B.S. degree from Hanyang University, South Korea, in 2019, where he is currently pursuing the M.S. and Ph.D. degrees with the Mechanical Engineering Department. His research interests include micro sensors for aeronautical applications, precision engineering, micromachining, and thin film deposition.
Jaebum Sung received the B.S. degree from Hanyang University, South Korea, in 2019, where he is currently pursuing the M.S. and Ph.D. degrees with the Mechanical Engineering Department. His research interests include micro sensors for aeronautical applications, precision engineering, micromachining, and thin film deposition.View more
Department of Mechanical Convergence Engineering, Hanyang University, Seoul, South Korea
Institute of Nano Science and Technology, Hanyang University, Seoul, South Korea
Hongyun So (Member, IEEE) received the B.S. degree from Hanyang University, South Korea, in 2009, the M.S. degree from KAIST, South Korea, in 2011, and the Ph.D. degree from the University of California, Berkeley, in 2014, all in mechanical engineering. He joined Stanford University, in 2015, as a Postdoctoral Scholar with the Aeronautics and Astronautics Department. He is currently an Assistant Professor with the Mechanical Engineering Department, Hanyang University. His research interests include design, modeling, and manufacturing of micro/nanosystems, harsh-environment sensors, and mechanical issues related to heat transfer and fluid mechanics.
Hongyun So (Member, IEEE) received the B.S. degree from Hanyang University, South Korea, in 2009, the M.S. degree from KAIST, South Korea, in 2011, and the Ph.D. degree from the University of California, Berkeley, in 2014, all in mechanical engineering. He joined Stanford University, in 2015, as a Postdoctoral Scholar with the Aeronautics and Astronautics Department. He is currently an Assistant Professor with the Mechanical Engineering Department, Hanyang University. His research interests include design, modeling, and manufacturing of micro/nanosystems, harsh-environment sensors, and mechanical issues related to heat transfer and fluid mechanics.View more
