Apr 11, 2026
We present a fiber-optic liquid level sensor that is conducted by a combination of optical interferometry and lever principle. The sensing unit is a Mach-Zehnder interferometer (MZI), which is
Aug 19, 2025
Abstract 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
May 11, 2026
Abstract A novel highly sensitive liquid-level sensor based on an asymmetric dual side-hole fiber (DSHF) using the core mode as the sensing mode and the cladding mode as the reference
Feb 09, 2026
In this paper, we demonstrate a novel in-fiber liquid level sensor based on the multimode fiber cascading hollow-core fiber and FBG (MMF-HCF-FBG) structure. The principle of the sensor is
Nov 03, 2025
Optical fibers with certain length are connected at the splitter''s outputs and these fibers have flat cleaved end facet. Each of these fiber''s end facets is then fixed uniformly at certain height within the
Nov 29, 2025
A temperature-insensitive U-shaped liquid level sensor based on single-mode fiber (SMF) cascaded with double spheres is proposed. Cladding modes are excited by spherical structures.
Oct 27, 2025
In this paper, we present a polymer optical fiber (POF) Bragg grating (FBG) to measure liquid level based on Archimides'' law of buoyancy. The sensor c
Oct 18, 2025
The sensor head is composed of a single-mode taper-thin core taper single-mode fiber structure constructed via fusion splicing. The operational
Jun 18, 2026
An optical fiber liquid level sensor based on two twisted polymer optical fibers twining around a racetrack column is demonstrated in this study.
May 28, 2026
An optical fiber sensor combining the Sagnac interference and modal interference was fabricated and experimentally investigated for the measurements of liquid level and strain.
Mar 27, 2026
Abstract Liquid level sensors can be constructed using a pair of bundle probe based on fiber-optic displacement sensor. The working mechanism of the sensor is detecting displacement in
Sep 27, 2025
The operating principle of the hydrostatic fiber-optic liquid level sensor with a PSD. The optical triangulation sensor for small displacements 13 is connected through the optical feedthroughs
Feb 22, 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,
Mar 13, 2026
sensor based on a SMF cascade with double spheres is designed and demonstrated for liquid level measurement. Cladding modes are more easily excited by spherical structures, and higher-order
Nov 25, 2025
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 03, 2025
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 25, 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
Jun 19, 2026
Liquid-level sensors are required in modern industrial and medical fields. Optical liquid-level sensors can solve the safety problems of traditional
Apr 28, 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.
Jul 29, 2025
In this work, a highly sensitive liquid level sensor formed by using a short section of HCF sandwiched between two single mode fibers (SMFs) is proposed and experimentally demonstrated.
Dec 16, 2025
With the merits of low-cost, large-scale and ease of fabrication, our scheme is very practical and promising in the engineering and applications related to liquid level sensing.
Sep 28, 2025
This work reports an optical fiber–based continuous liquid level sensor for cryogenic propellant mass gauging, which has significant advantages
Dec 15, 2025
We propose and demonstrate an all-fiber liquid-level sensor using an in-line multimode-single-mode-multimode (MSM) fiber structure. A piece of single
Jan 27, 2026
A novel reflective liquid level sensor based on single-mode-offset coreless-single-mode (SOCS) fiber structure is proposed and experimentally demonstrated. Theory analyses and
Apr 25, 2026
Liquid level measurement in microfluidics is challenging, where a sensor with ultra-high sensitivity but miniature in nature is demanded. In this paper, we propose for the first time a
Oct 17, 2025
Abstract and Figures We present a fiber-optic liquid level sensor that is conducted by a combination of optical interferometry and lever principle.
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