Real-time Liquid Level Measurement using a Plastic Optical Fiber
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
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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
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. The POF with a
Schematics of fiber optic liquid level sensor system based on a combination of optical interferometry and leverage principle. (a) Lever based
Hysteresis was minimal for organic liquids (e.g. ethanol) and liquids at elevated temperatures, where liquid adhesion is low. The study demonstrates the development of a novel low
At the same time, we can measure the refractive index of the liquid based on the maximum peak wavelength shift. We can also use the sensor for continuous and discrete liquid level sensing
A fiber-optic sensor is a sensor that uses optical fiber either as the sensing element ("intrinsic sensors"), or as a means of relaying signals from a remote sensor to the electronics that process the signals
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
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 wavelength range.
This work reports an optical fiber–based continuous liquid level sensor for cryogenic propellant mass gauging, which has significant advantages over the existing liquid level sensors in terms of accuracy,
Discrete level sensors are typically based on the change in optical reflection from or transmission through the sensor head, due to the change in refractive index surrounding the sensor head, when
Armstrong has developed a robust fiber optic–based sensing technology that offers extraordinary accuracy in liquid level measurements. The sensing system uses
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
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
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
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An optical fiber sensor combining the Sagnac interference and modal interference was fabricated and experimentally investigated for the measurements of liquid level and strain.
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
A liquid accumulation prevention structure is used for all liquid level contact type models. Multi step tip design prevents accumulation of liquid at the tip of the sensor head.
A fiber optic liquid level sensor system comprising multiple multiplexed probes has been successfully demonstrated. Optical time domain reflectometer (OTDR) is the primary tool for installing and
References (21) Abstract The effect of cladding mode frustrated total internal reflection (CMFTIR) in macrobend polymer optical fiber is first used to achieve continuous liquid-level dynamic
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 sensing
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
In this context, this paper presents three specific optical fiber sensor technologies that show considerable potential for liquid-level monitoring: the Mach-Zehnder and Fabry-Perot
The results demonstrate that this fiber optic level sensor is not only easy-to-make, cost-effective and robust but also offers sensitive, stable and
Hydrostatic pressure measurement with optical sensors enables precise long-term monitoring of liquid levels. The sensors are extremely robust and stable, as well
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