Jan 31, 2026
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Nov 11, 2025
Abstract A highly sensitive liquid level sensor based on an optical fiber Michelson interferometer with core-offset structure has been proposed and demonstrated. The sensor was
Jun 30, 2026
Consequently, it provides a new perspective for liquid level and temperature measurements. The FPI sensor is a three-wave interference model. To realize low-temperature
Mar 05, 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 27, 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
Nov 06, 2025
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
Aug 18, 2025
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Jan 15, 2026
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.
May 02, 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
Aug 16, 2025
Among optical fiber liquid level sensors, those based on all-fiber interferometers have been extensively explored for flexible structure and high sensitivity, especially realizing optical interference
Oct 28, 2025
Abstract A high sensitivity liquid level sensor formed by using a 15-mm-long hollow core fiber sandwiched between two single mode fibers is proposed and experimentally demonstrated.
Apr 27, 2026
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.
Jan 11, 2026
Self-Temperature Compensated Fiber-Optic Liquid Level Sensor With Ultra-Long Linear Range Using Quasi-Single Modal Interferometer Abstract: In this paper, a thin-core fiber based in
May 16, 2026
Discover fiber-optic level sensors from Polytec: precise, maintenance-free, drift-free, ATEX-safe and immune to EMI for industry, research & medical.
Dec 18, 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
Oct 26, 2025
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
Feb 08, 2026
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 23, 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,
Jan 30, 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
Jul 30, 2025
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,
Aug 31, 2025
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 increase the sensing accuracy. The proposed
Sep 04, 2025
This work reports an optical fiber–based continuous liquid level sensor for cryogenic propellant mass gauging, which has significant advantages
Dec 08, 2025
FU-95Z, Liquid-level-detection Fiber Unit in FS-N40 series by KEYENCE America.
Jul 18, 2025
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 14, 2025
In this work, we have proposed and demonstrated a novel fiber-optic liquid level sensing system by utilizing Ti-EFPI based single-passband MPF. The Ti-EFPI functions as both a spectral slicing
Dec 19, 2025
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 05, 2026
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
Jun 16, 2026
During the experiment, fiber optic liquid level sensors with different offsets are fabricated to study the liquid level sensitivities of these sensors.
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