Here, we present the development of compact pH fiber probes by integrating silica optical fiber with a colorimetric pH indicator. Our approach
The phase and modulation values were found to be strongly pH-dependent in the physiological pH range, over the easily accessible range of light modulation frequencies from 10 to
IMTC 2005 – Instrumentation and Measurement Technology Conference Ottawa, Canada, 17-19 May 2005 pH Measurements Using S imple
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
Measuring pH is a critical parameter in environmental monitoring, biomedical diagnostics, food safety, and industrial processes. Optical fiber
Optical fiber sensors have proven highly effective for pH detection due to their exceptional sensitivity, rapid response, and resistance to electromagnetic interference, making them well suited for real-time
The same approach was used in the development of optical fiber sensors for biochemical analysis [86,87], determination of solution pH [88,89],
In this study, we propose a highly sensitive multichannel pH sensor that is based on an optical-fiber pulse width modulation (PWM) technique. According to the optical-fiber PWM method, the received
We compared the performance of the proposed optical-fiber PWM pH-sensing systems with different pH sensors: potentiometric, optical-fiber modal interferometer, and optical-fiber Fabry–Perot
Abstract A new design of a fiber optic Surface Plasmon Resonance (SPR) sensor using Palladium as a sensitive layer for hydrogen detection is
Moreover these sensors can be used in hazardous media without compromising its accuracy. Several types of fiber based pH sensors are fabricated to detect the pH of aqueous
Distributed optical fiber vibration sensing (DOFVS) has emerged as a vital technology for the safety monitoring of long-distance critical infrastructure, owing to its distinct advantages, including
A hydrogen sensing system including 8 sensors based on light polarization modulation is developed and demonstrated for simultaneous multi-point hydrogen sensing with high sensitivity.
These hydrogel-based sensors offer a reliable, versatile solution for pH monitoring and hold significant promise for applications in the beverage, food, pharmaceutical, and point-of-care...
A fiber optic pH sensor based on single fiber phase fluorescence lifetime measurements of commercially available fluorescence indicators is described.
Wavelength-modulated pH sensors (that are superior to intensity based interferometric sensors) were described that use a pH-sensitive hydrogel with an optical fiber Bragg grating.
Abstract A novel mode-filtered light fiber optic pH sensor was developed by inserting an optical fiber immobilized with a pH-sensitive indicator into a fused-silica capillary. In the experiment,
Abstract Fiber-optic technology emerged originally for applications in data transmission and telecommunications. However, sensors based on fiber
A reflective intensity-modulated fiber-optic sensor based on microelectromechanical systems (MEMS) for pressure measurements is
Herein, a fluorescent fiber pH sensor, based on orange-emitting SiQDs, was developed for sensitive pH detection in biological and environmental samples (Fig. 1).
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Abstract Fiber optic sensor pH Mode-filtered light detection Bromocresol green Cresol red a b s t r a c t A novel mode-filtered light fiber optic pH sensor was
This article provides a comprehensive introduction to fiber-optic sensors, also called optical fiber sensors. It explains how these devices use optical fibers to measure
In this study, we propose a highly sensitive multichannel pH sensor that is based on an optical-fiber pulse width modulation (PWM) technique. According to the optical
Fiber-optic pH sensors are usually based on the evanescent-wave and reflection principles [4, 8 – 11]. Mainly reflection-based sensors have been
A no-core fiber pH sensor based on wavelength interrogation technique is fabricated and demonstrated in this paper. The sensing head is prepared by coating of smart hydrogel on NCF.
In addition, the measurement of an evanescence field interaction between the optical fiber core and a luminescence material attached to it was also successfully used in a fiber-optic flow cell
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