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This study presents a cost-effective liquid level sensor using a V-groove plastic optical fiber (POF). The easily fabricated sensor offers high sensitivity and fast response times for various liquid sensing applications.

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Area of Science:

  • Photonics and Optical Sensing
  • Materials Science and Engineering
  • Instrumentation and Measurement

Background:

  • Traditional liquid level sensors can be complex and expensive to fabricate.
  • Plastic optical fibers (POFs) offer potential for cost-effective sensing solutions.
  • Developing robust and sensitive liquid level sensors is crucial for industrial and environmental monitoring.

Purpose of the Study:

  • To develop and characterize a novel, high-sensitivity liquid level sensor.
  • To utilize a V-groove structure fabricated on POF for enhanced sensing capabilities.
  • To demonstrate a cost-effective and easily manufacturable sensor for liquid level detection.

Main Methods:

  • Fabrication of V-groove structures on POF using a die-press-print method.
  • Investigation of transmission characteristics changes due to liquid immersion/emergence.
  • Testing sensor performance with varying structural parameters, liquid refractive indices, and dynamic response.

Main Results:

  • Achieved high sensor sensitivity of 0.0698 mm-1.
  • Demonstrated a resolution of 2.5 mm for liquid level detection.
  • Recorded a fast sensor response time of 920 ms.

Conclusions:

  • The V-groove POF sensor offers a simple, cost-effective, and highly sensitive solution for liquid level sensing.
  • The die-press-print fabrication method facilitates mass production and enhances practical applicability.
  • The sensor's performance is suitable for diverse liquid sensing applications requiring rapid and accurate measurements.