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Measurement of Fluid Pressure01:16

Measurement of Fluid Pressure

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Fluid pressure is commonly measured using devices called manometers, which rely on liquid columns to indicate pressure differences. The height of a liquid column in a manometer reflects the pressure exerted by the fluid, providing a simple yet effective means of measurement. Different types of manometers serve specific purposes based on their configurations and the type of fluids involved.
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
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Updated: Jul 20, 2025

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
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A Highly Sensitive 3D Resonator Sensor for Fluid Measurement.

Ali M Almuhlafi1, Omar M Ramahi2

  • 1Electrical Engineering Department, King Saud University, Riyadh 11421, Saudi Arabia.

Sensors (Basel, Switzerland)
|July 29, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces a novel trapezoid-shaped resonator (TSR) for enhanced sensing. The new design combines advantages of split ring resonators (SRR) and complementary electric-LC resonators (CELCR) for improved sensitivity.

Keywords:
complementary electric-LC resonatorcomplementary split-ring resonatorsfluid-level detectionmicrowavessensitivity enhancementsplit-ring resonators

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Area of Science:

  • Physics
  • Electrical Engineering
  • Materials Science

Background:

  • Planar sub-wavelength resonators are crucial for sensing applications.
  • Split ring resonators (SRR) offer small sensing regions suitable for microfluidics but have limited sensitivity.
  • Complementary electric-LC resonators (CELCR) provide higher sensitivity but have larger sensing regions and limited design flexibility.

Purpose of the Study:

  • To develop a novel resonator design that merges the benefits of SRR and CELCR.
  • To enhance sensor sensitivity by optimizing the sensing region and electric field concentration.
  • To create a versatile sensor platform for dielectric fluid analysis.

Main Methods:

  • Proposed a trapezoid-shaped resonator (TSR) incorporating metallic bars.
  • Utilized numerical simulations for sensor design and performance evaluation.
  • Fabricated the sensor using PCB technology with aluminum components and tested with dielectric fluids.

Main Results:

  • The trapezoid shape effectively reduced the sensing region.
  • Incorporated metallic bars significantly enhanced the electric field within the sensing area.
  • Experimental results demonstrated appreciably enhanced sensitivity compared to previous sensor designs.

Conclusions:

  • The proposed trapezoid-shaped resonator (TSR) with metallic bars offers a superior sensing platform.
  • This design overcomes limitations of traditional SRR and CELCR sensors.
  • The TSR presents a promising advancement for high-sensitivity sensing applications.