May 11, 2026
Abstract This study presents a high-precision liquid-level sensing system that integrates a titanium diaphragm extrinsic Fabry-Perot interferometer (Ti-EFPI) with a microwave photonic filter (MPF).
Feb 01, 2026
In this paper, a dual-parameter liquid level and refractive index (R.I.) sensor is fabricated using three pieces of bare polymer optical fibers (POFs),
Jan 10, 2026
Therefore, according to the basic working principle of optical fiber macro-bending loss, a new type of spiral plastic optical fiber (POF) liquid level sensor was designed.
Apr 20, 2026
An intensity-based fiber-optic liquid-level sensor for point measurement is described. The sensing principle is based on the total internal reflection of light, which is disturbed by contact with a
Apr 29, 2026
Fiber optic-based liquid-level sensors (FOLLSs) can work in harsh environments with inherent advantageous features that only optical fiber offers, such as intrinsic safety, resistance to
Dec 20, 2025
This article presents a portable optical fiber sensor (OFS) design for continuous liquid level measurement, fabricated using two pieces of bare polymer optical fibers (POFs). The proposed
Jul 06, 2026
In this paper, a novel liquid level sensing system is proposed to enhance the capacity of the sensing system, as well as reduce the cost and
Sep 04, 2025
Fiber-optical liquid-level sensors have attracted much attention in the fields of chemical engineering, petro-chemicals and public water-supply, due to the distinctive advantages of light
Apr 06, 2026
We propose a fiber optic liquid chemical sensor (FOCS) system using specialty optical fibers and an optical time domain reflectometer (OTDR), and is based on the leaky wave mode
Mar 10, 2026
Abstract An intensity-based fiber-optic liquid-level gauge for continuous measurement is described. The sensing principle is based on the total internal reflection of light within the fiber optic,
Mar 27, 2026
A fiber-optic liquid level sensor based on multimode interference (MMI) effects is proposed and demonstrated. We show that MMI and self-image effects can be effectively applied for
Apr 11, 2026
An innovative fiber optic liquid level sensor based on a peanut-shaped fiber structure has been designed and fabricated for use in micro-buoy systems. This sensor features two cascaded peanut-shaped
Dec 17, 2025
In this work, a plastic optical fiber (POF) based surface plasmon resonance (SPR) sensor is proposed and demonstrated for simultaneous
Apr 27, 2026
Abstract: The work describes a surface plasmon resonance (SPR) sensor that measures the liquid level and refractive index (RI) simultaneously. The sensor is fabricated by a polymer optical fiber (POF)
Oct 16, 2025
An optical fiber sensor combining the Sagnac interference and modal interference was fabricated and experimentally investigated for the measurements of liquid level and strain.
Oct 28, 2025
This paper presents a portable dual-point optical fiber sensor system for continuous liquid level measurement using polymer optical fibers (POFs). The system contains sensor design and
Feb 14, 2026
In addition, the fiber optic level sensor shows a stable and reproducible response over several cycles of 30 min duration at different liquid levels. The results demonstrate that this fiber optic
Nov 02, 2025
Abstract The work describes a surface plasmon resonance (SPR) sensor that measures the liquid level and refractive index (RI) simultaneously.
Aug 18, 2025
FU-95Z, Liquid-level-detection Fiber Unit in FS-N40 series by KEYENCE America.
Jul 30, 2025
Hawk Measurement develops & manufactures level measurement, blocked chute detection, sonar interface sensing and fiber optic sensing solutions for industries
Mar 19, 2026
Polymer optical fiber (POF) level sensors have a lot of potential in liquid level sensing because of their inherent safety, chemical corrosion resistance, anti-electromagnetic interference,
Oct 23, 2025
This study introduces a cost-effective solution and sensor arrays for the multipoint liquid-level measuring sensor based on an intensity modulation
Apr 10, 2026
Abstract This study presents a fiber optic liquid level sensor (FOLLS) by acquiring information from the amplitude of spectral fast Fourier transform (FFT) in a specified narrow
Oct 06, 2025
Design and construction of an optical fiber sensor for liquid level detection are reported. This sensor operates based on light intensity modulation, and such modulation results from alteration
Mar 16, 2026
Liquid level sensing is nowadays a relevant issue in a broad range of applications, forcing the sensors performance and cost to be evaluated in parallel. This paper proposes a fiber optic
Apr 15, 2026
In this work, a novel optical fiber sensor capable of measuring both the liquid level and its refractive index is designed, manufactured and demonstrated through simulations and experimentally
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