Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Capacitor With A Dielectric01:18

Capacitor With A Dielectric

4.0K
Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
4.0K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Batteryless wireless tilt sensor with self-calibration capability for structural health monitoring.

Communications engineering·2026
Same author

Patterning of Complex, Nanometer-Scale Features in Wide-Area Gold Nanoplasmonic Structures Using Helium Focused Ion Beam Milling.

ACS applied materials & interfaces·2021
Same author

A Survey on Battery-Less RFID-Based Wireless Sensors.

Micromachines·2021
See all related articles

Related Experiment Video

Updated: Aug 15, 2025

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver
08:25

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver

Published on: August 27, 2021

2.6K

Wireless Capacitive Liquid-Level Detection Sensor Based on Zero-Power RFID-Sensing Architecture.

Shaheen Ahmad1, Ramin Khosravi2, Ashwin K Iyer2

  • 1Mechanical Engineering Department, University of Alberta, Edmonton, AB T6G 2R3, Canada.

Sensors (Basel, Switzerland)
|January 8, 2023
PubMed
Summary

A novel wireless liquid level sensor integrates a capacitive sensing element with a passive RFID architecture. This system achieves high sensitivity and reliable detection for various liquids without internal power, enhancing current sensor technology.

Keywords:
battery-lesscapacitive sensorgrounded coplanar waveguide (GCPW)interdigitated electrode capacitor (IDC)radio-frequency identification (RFID)sensitivityultrahigh frequency (UHF)wireless sensorzero-power sensor

More Related Videos

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
07:28

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

Published on: August 30, 2012

10.8K
Ultrasensitive Detection of Biomarkers by Using a Molecular Imprinting Based Capacitive Biosensor
08:22

Ultrasensitive Detection of Biomarkers by Using a Molecular Imprinting Based Capacitive Biosensor

Published on: February 16, 2018

12.2K

Related Experiment Videos

Last Updated: Aug 15, 2025

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver
08:25

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver

Published on: August 27, 2021

2.6K
Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
07:28

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

Published on: August 30, 2012

10.8K
Ultrasensitive Detection of Biomarkers by Using a Molecular Imprinting Based Capacitive Biosensor
08:22

Ultrasensitive Detection of Biomarkers by Using a Molecular Imprinting Based Capacitive Biosensor

Published on: February 16, 2018

12.2K

Area of Science:

  • Electrical Engineering
  • Sensor Technology
  • Wireless Communication

Background:

  • Traditional liquid level sensors often require internal power sources and complex circuitry.
  • Existing methods may have limitations in detecting both conductive and non-conductive liquids accurately.
  • There is a need for reliable, low-maintenance wireless sensing solutions.

Purpose of the Study:

  • To propose and validate a new wireless method for liquid level detection.
  • To integrate a capacitive Interdigitated Capacitor (IDC) sensing element with a passive Radio Frequency Identification (RFID) sensing architecture.
  • To demonstrate the sensor's capability for accurate and sensitive liquid level measurement.

Main Methods:

  • A capacitive IDC-sensing element was designed to transduce liquid level changes into capacitance variations.
  • These capacitance variations were linked to alterations in the phase of the RFID backscattered signal.
  • The system was tested in a real-world scenario, with the sensor placed up to 2 meters from the RFID reader.

Main Results:

  • The proposed sensor node demonstrated high sensitivity to liquid level variation, measuring 2.15°/mm.
  • The sensor accurately measured both conductive and non-conductive liquids due to a protective polyethylene coating.
  • Measurements were successfully performed at distances up to 7 meters from the RFID reader.

Conclusions:

  • The developed passive RFID-based sensor offers a reliable, power-free solution for wireless liquid level detection.
  • The sensor exhibits high sensitivity, linearity, repeatability, and real-time response, suitable for diverse applications.
  • This technology enhances the reliability and applicability of liquid level sensing compared to conventional methods.