Optical Sensors

Optical fiber-based liquid level sensor

[+] Author Affiliations
Sameer M. Chandani

University of British Columbia, Department of Electrical and Computer Engineering, 2332 Main Mall, Vancouver, BC, V6T 1Z4, Canada

Nicolas A. F. Jaeger

University of British Columbia, Department of Electrical and Computer Engineering, 2332 Main Mall, Vancouver, BC, V6T 1Z4, Canada

Opt. Eng. 46(11), 114401 (November 13, 2007). doi:10.1117/1.2801506
History: Received February 20, 2007; Revised June 06, 2007; Accepted June 08, 2007; Published November 13, 2007
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A liquid level sensor based on etched D-shaped silica optical fibers is presented. The optical transmission of the sensor depends on the liquid level. The sensor can be realized as a continuous level sensor with a high resolution and requires only one fiber and one optical source and detector. We have demonstrated a sensor with a resolution of 1mm. The sensor works for liquids with refractive indices greater than 1.45. We show that the sensor response is the same for increasing and decreasing liquid levels.

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© 2007 Society of Photo-Optical Instrumentation Engineers

Citation

Sameer M. Chandani and Nicolas A. F. Jaeger
"Optical fiber-based liquid level sensor", Opt. Eng. 46(11), 114401 (November 13, 2007). ; http://dx.doi.org/10.1117/1.2801506


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