The Effect of a Pattern of Capacitive Sensors for Liquid Level Measurements

Nikolov, Georgi; Gieva, Elitsa; Nikolova, B. M.; Ruskova, Ivelina

doi:10.1109/isse49702.2020.9121113

Cited by 4 publications

(2 citation statements)

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“…In a coplanar electrodes configuration, sensors were affixed to either the bottom or the side of a liquid container to leverage the fringing electric field [17,18]. In the case of lateral sensor placement, electrodes were attached to the exterior wall of the container [19][20][21][22][23][24] or inside the container [25,26]. This arrangement achieved a resolution of 0.1 mm [21], although the larger electrodes were necessary to cover the entire lateral surface.…”

Section: Introductionmentioning

confidence: 99%

Liquid level measurement using a single electrode capacitive sensor made of carbon nanotube-paper composite

Qian,

Li,

Kim

et al. 2024

Phys. Scr.

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Liquid level measurements play a vital role in various fields, including environmental, industrial, and medical applications. While hydrostatic, optical, and ultrasonic sensors are commonly used for this purpose, capacitive sensors have also gained prominence. However, capacitive sensors have inherent limitations in terms of dynamic range and resolution. These sensors consist of a pair of electrodes with a gap, and the size of this gap directly affects the sensor's dynamic range and resolution. Increasing the gap size enhances the dynamic range but compromises resolution. To overcome this challenge, a novel approach involving the investigation of a single-electrode capacitive sensor is presented. This sensor consists of using a carbon nanotube-paper composite (CPC), which offers unique advantages for measuring liquid levels with improved dynamic range and resolution. The sensing performance of the single-electrode sensor is evaluated in both conductive and non-conductive containers, ensuring its versatility and applicability in different scenarios. Furthermore, the study explores the implementation of a differential configuration for the single-electrode sensor. This configuration aims to enhance accuracy and stability, particularly in achieving femto-Farad level accuracy. By leveraging the potential of the single-electrode capacitive sensor, numerous applications such as liquid level sensing, immersible liquid level sensing, and rain sensing are demonstrated. This result holds potential for advancing liquid level measurement capabilities across various industries and opening up new opportunities for sensor applications.

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Section: Introductionmentioning

confidence: 99%

Liquid level measurement using a single electrode capacitive sensor made of carbon nanotube-paper composite

Qian,

Li,

Kim

et al. 2024

Phys. Scr.

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“…This technique can be used to determine the liquid level in a tank, well, river or other body of liquid. (Nikolov and Nikolova, 2008). Usually, a gauge pressure sensor has one side connected to the pipe (pressure side) and the other side open to ambient (in this case, atmospheric) pressure.…”

Section: The Building Blocks Of Wsn For Water Monitoringmentioning

confidence: 99%

Sensor based method for water monitoring in smallholder irrigatted agriculture Tanzania

Njuu¹

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Monitoring water use in traditional irrigation canals is critical for any water management best practice to function. In Tanzania, water basin authorities and users association have been created to distribute and levy water usage fee in view of avoiding conflicts. Although much has been done over the years, the authorities have so far failed to ensure the desired equity, fairness and transparency. This is largely attributed to high deployment cost which constrains the uptake of various technologies. In agriculture, one of the commonly used technologies is sensors. Effective utilization of sensors requires a design that matches the physical and connectivity environment of the area. In this dissertation, we present such a system of wireless sensor network designed for the purpose of improving water management in farmer-led irrigation. The system consist of a low-cost design of a sensor system that measures water depths at specific canal points and transmits the measurements to a central system. The central system transforms the measurements into discharge values using a locally established rating curve. For the end user, we have provided a web based application for administering the canals; visualize canal discharge values; and generating reports. The system can easily be scaled up to monitor larger networks of canals, and can therefore be a game changer when deployed.

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