Jan 22, 2026
In this work, the fiber-optic chemical pH sensors were fabricated based on carboxyl ZnCdSe/ZnS quantum dots (QDs) and tapered optical fiber. The photoluminescence (PL) intensity of
Apr 24, 2026
Finally, the performance of the proposed PWM pH sensor was compared with that of potentiometric, optical-fiber modal interferometer, and optical-fiber Fabry–Perot interferometer pH sensors with
Jul 25, 2025
This article provides a brief review on the development and applications of optical and fiber-optic pH sensors in the 1990s. Various methods and materials for immobilization of pH
May 29, 2026
Fiber-optic sensors provide real-time monitoring, showcasing the robustness of pH sensors in challenging environments. They exhibit heightened sensitivity, rapid response, and a
Sep 08, 2025
In this paper, a novel fibre optic sensor system for sensing pH in the alkaline region has been reported. The sensing mechanism was based on the pH induced change in fluorescence
Jul 03, 2026
Distributed fiber optic pH sensors were developed using the pH sensitive SiO 2 based materials coated on the optical fiber. Connected to an OBR, the SiO 2 /Au-SiO 2 based fiber optic pH
Feb 27, 2026
Abstract pH value plays a vital role in biochemical analysis. To achieve online analysis, a new type of fluorescent fiber sensor has been developed for real-time, wide-range pH monitoring in
Sep 24, 2025
Abstract A pH sensor based on polymethylmethacrylate (PMMA) optical fibers has been developed for on-body monitoring in biological fluids. Detection relies on evanescent wave
Apr 10, 2026
Measuring pH is a critical parameter in environmental monitoring, biomedical diagnostics, food safety, and industrial processes. Optical fiber sensors have proven highly effective for pH detection due to
May 17, 2026
In this article, we report the analysis of a novel optical fiber pH sensor based in polyaniline (PAni) coating applied on a trenched core-free (only-bridge) silica fiber. The results are compared to
Mar 10, 2026
The fiber-optic chemical pH sensor can well address the problems of traditional pH sensors mentioned above, exhibiting excellent advantages of anti-electromagnetic interference, fast
May 01, 2026
The discussion extends to the impact of pH- sensitive coatings—ranging from nanomaterials and polymeric films to graphene-based compounds—on enhancing sensor performance. Recent
Dec 11, 2025
Abstract Fluorescent fiber optic sensors hold promise for monitoring the pH of concrete due to their high accuracy and small size, but they still face issues such as long response times and
Dec 27, 2025
Herein, we have developed hydrogel-based optical fiber (OF) sensors for continuous and real-time pH sensing using a hydrogel matrix with the pH-sensitive dye Neutral Red to obtain a color
Sep 10, 2025
The optical fiber pH sensor has additional advantages of being self-referencing, without the need of an external sensor reference, having a simple fabrication method and basic spectrometer
Apr 03, 2026
Electrochemical pH sensors are unstable and inaccurate under such circumstances. As a result, recent research has focused on developing robust optical pH measurement systems that can
Sep 11, 2025
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Apr 02, 2026
Table 2: A comparison of optical fiber-based pH sensor technologies, detailing their operating principles, functional roles, constituent materials, light sources, detection mechanisms,
Aug 31, 2025
1 Introduction Optical fiber-based pH sensors have become one of the hot topics in the field of research due to their numerous advantages such as being light weight, small in size, and highly sensitive and
Aug 12, 2025
The present work describes the fabrication and characterization of an optical fiber pH sensor using a sol–gel technique. The sensing head
Jan 18, 2026
Whereas, the fiber optics based pH sensors are more beneficial due to compact size, wide range sensing, ease of fabrication and cost effective devices. Moreover these sensors can be used
Jul 23, 2025
Over the past two decades, the development and applications of chemical sensors and biosensors have grown rapidly . Among all sensors, pH sensors have received the most attention
Jun 24, 2026
The fiber optic sensor is based on a Mach-Zehnder interferometric technique, where the pH sensitive material is coated on a short, typically 20-25
Aug 03, 2025
This review offers a comprehensive analysis of recent advances in optical fiber-based pH sensors, covering key techniques such as fluorescence-based, absorbance-based, evanescent wave, and
Mar 13, 2026
Microfluidics is used in many applications ranging from chemistry, medicine, biology and biomedical research, and the ability to measure pH values
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