May 06, 2026
Sensitivity levels of 1.4 and 3.3 mV/mm were achieved for water level fluctuations below and above 45 cm, respectively. Furthermore, the sensor demonstrated consistently stable
Dec 18, 2025
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
Aug 27, 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
Mar 27, 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
Jan 03, 2026
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,
Feb 17, 2026
Abstract Liquid-level sensors are required in modern industrial and medical fields. Optical liquid-level sensors can solve the safety problems of traditional electrical sensors, which have attracted
Feb 05, 2026
A novel fiber-optic liquid level sensor based on a cross-correlation optical time-domain Fresnel reflection technology is proposed and demonstrated. By processing a single-mode fiber (SMF) to create
Mar 19, 2026
The article deals with the use of intensity-based fiber optic sensors for the level measurement. Two types of optical fiber sensors have been tested. In the first case the sensing
Feb 16, 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
Jan 18, 2026
In this paper, we present a fiber sensor using a fiber Bragg grating encapsulated in a half-polymer-filled metal cylinder for measuring liquid level variation. The operating mechanism of this novel design is
Nov 18, 2025
To achieve accurate, continuous, and online monitoring of liquid levels over a wide range, we investigate a liquid level sensor based on reflective optical fiber. The theoretical model of liquid
May 24, 2026
The working of a robust, long dynamic range, quasicontinuous fibre-optic liquid-level sensor is demonstrated in this communication.
Nov 16, 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 consists of polymer 3D-printed rods with different
Sep 12, 2025
Commercial accounting for petroleum products requires more precise measurements and more stable operation of the liquid level gauges set up for factory conditions and spark-explosion
Feb 01, 2026
This chapter reports optical fiber‐based sensors for liquid‐level detection in aerospace environment. It discusses preliminary experimental work to investigate an optical fiber liquid‐level detection system
Nov 11, 2025
FU-95Z, Liquid-level-detection Fiber Unit in FS-N40 series by KEYENCE America.
Jul 16, 2025
POF performs well in liquid level sensing applications. The innumerable advantages like low cost, light weight, electromagnetic immunity, chemical corrosion resistance, good bandwidth, and simple
Jun 03, 2026
Fiber-optic sensing technologies overcome these drawbacks by offering intrinsic safety, strong corrosion resistance, and anti-electromagnetic interference, making it suitable for complex industrial
Oct 23, 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.
May 14, 2026
An optical fiber liquid level sensor based on differential optical absorption is described. The sensor uses a two-wavelength ratiometric approach to cancel out errors arising from variations in fuel
Jul 20, 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
Sep 07, 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 05, 2026
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
Dec 18, 2025
As the detected liquid level shows a shift from the correct liquid level owing to surface tension and the broadening of the laser light, we correct the shift through calculations. The sensor
Mar 03, 2026
Fiber-Optic Level Sensor Hydrostatic pressure measurement with optical sensors enables precise long-term monitoring of liquid levels. The sensors are extremely
Jun 20, 2026
In recent years, polymer optical fiber has shown promising potential for its use in liquid level sensors. The versatility of optical fiber allows it to meet a wide range of sensing requirements. Polymer
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