Electrochemical Gas Sensors

Mari, C.M.; Barbi, G

doi:10.1007/978-94-011-2737-0_10

Cited by 8 publications

(7 citation statements)

References 25 publications

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“…Since the first amperometric oxygen sensor was developed in 1956 by Clark, the use of amperometric sensors has become one of the most common methods for gas detection. Amperometric gas sensors are used to measure a wide range of gases in many media, both liquids and atmospheres, as has been described in several excellent reviews. − One market where electrochemical gas sensors dominate is the monitoring of workplace atmospheres for exposure to toxic gases. The sensors are typically small, relatively rugged, and inexpensive, and they manifest favorable accuracy and precision.…”

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confidence: 99%

Amperometric Gas Sensor Response Times

Warburton¹,

Pagano²,

Hoover³

et al. 1998

Anal. Chem.

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This work examines the relative importance of diffusion and the electrical time constant of the working electrode on the response time of amperometric gas sensors. The response curve of an electrochemical carbon monoxide sensor to a 200 ppm CO test gas was measured as a function of the added resistance that is in series with the working electrode to increase the time constant. It has been found that the response time increases with additional resistance. The experimental behavior was compared to the values predicted on the basis of Fick's second law of diffusion and to the values expected on the basis of the electrical properties of the sensor. The behavior of the sensor was explained using an equivalent electrical circuit, describing the time constants of the working electrode. Values obtained from this model were further compared to experimental values obtained from electrochemical impedance spectra. It has been found that the response time of the sensors depends on both the rate of diffusion and the electrical time constants of the working electrode.

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confidence: 99%

Amperometric Gas Sensor Response Times

Warburton¹,

Pagano²,

Hoover³

et al. 1998

Anal. Chem.

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“…The group of potentiometric gas sensors has been fabricated with solid electrolyte elements and is thought to be of great benefit as a gas sensor due to their high sensitivity and selectivity, rapid response, and long-term output stability from an electromotive force (emf), which is an open circuit voltage. This emf is produced by the exchange processes of the elemental charge taking place at the interfaces between an electronic and an ionic conductor [120].…”

Section: Journal Of Sensorsmentioning

confidence: 99%

“…The amperometric sensor is an electrochemical device in which the current flowing through the system is related to the concentration of the gaseous species [120]. Basically, amperometry consists of a two-electrode configuration (Figure 16).…”

Section: Journal Of Sensorsmentioning

confidence: 99%

Sensing Techniques on Determination of Chlorine Gas and Free Chlorine in Water

et al. 2022

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Chlorine gas is a greenish-yellow gas that is one of the most utilized gases in numerous industrial fields. It has been categorized as a choking agent that can threaten human, animal, and environmental safety. Currently, development of highly sensitive, selective, and precise chlorine sensors receives much attention. This review focuses on several sensing techniques used for chlorine gas and free chlorine in water. The fundamental working principles, as well as the sensing mechanisms of chlorine detection covering spectrophotometric, electrochemical, and optical techniques, are described. A comparison of various sensing materials is also discussed. Finally, an overview of the future improvements needed of high-performance chlorine sensors was suggested.

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“…The measured current between the working and counter electrodes is proportional to the concentration of methane detected. The selection of materials for the electrolyte, electrodes and catalyst defines the properties of electrochemical sensors and their applications [87]. The classification of electrochemical sensors according to the applied electrochemical transduction mode include potentiometric sensors, voltammetric/amperometric sensors, and conductometric sensors [84,[88][89][90].…”

Section: Electrochemical Sensorsmentioning

confidence: 99%

A Review of Methane Gas Detection Sensors: Recent Developments and Future Perspectives

et al. 2020

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Methane, the primary component of natural gas, is a significant contributor to global warming and climate change. It is a harmful greenhouse gas with an impact 28 times greater than carbon dioxide over a 100-year period. Preventing methane leakage from transmission pipelines and other oil and gas production activities is a possible solution to reduce methane emissions. In order to detect and resolve methane leaks, reliable and cost-effective sensors need to be researched and developed. This paper provides a comprehensive review of different types of methane detection sensors, including optical sensors, calorimetric sensors, pyroelectric sensors, semiconducting oxide sensors, and electrochemical sensors. The discussed material includes the definitions, mechanisms and recent developments of these sensors. A comparison between different methods, highlighting the advantages and disadvantages of each, is also presented to help address future research needs.

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Electrochemical Gas Sensors

Cited by 8 publications

References 25 publications

Amperometric Gas Sensor Response Times

Amperometric Gas Sensor Response Times

Sensing Techniques on Determination of Chlorine Gas and Free Chlorine in Water

A Review of Methane Gas Detection Sensors: Recent Developments and Future Perspectives

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