1 November 2007 Optical fiber-based liquid level sensor
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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 ~1 mm. 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.
© (2007) Society of Photo-Optical Instrumentation Engineers (SPIE)
Sameer M. Chandani, Nicolas A. F. Jaeger, "Optical fiber-based liquid level sensor," Optical Engineering 46(11), 114401 (1 November 2007). https://doi.org/10.1117/1.2801506 . Submission:

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