A colorimetric CO sensor for fire detection

Courbat, J.; Pascu, Mirela; Gutmacher, D.; Briand, D.; Wöllenstein, Jürgen; Hoefer, Ulrich; Severin, Kay; Rooij, N. F. de

doi:10.1016/j.proeng.2011.12.328

Cited by 18 publications

(12 citation statements)

References 3 publications

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“…Sensing experiments were carried out in a stainless steel cylindrical custom-built gas-sensing chamber, with the following dimensions: internal diameter 21.05 cm, internal depth 9.25 cm, internal volume 3219 cm 3 . Ammonia gas (500 ppm, nitrogen fill) and N 2 gas (for further dilution of NH 3 ) were purchased from BOC gases UK.…”

Section: Methodsmentioning

confidence: 99%

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Conducting polymer percolation gas sensor on a flexible substrate

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Section: Methodsmentioning

confidence: 99%

“…2 For example, the cheapest and thus a popular type of CO detector utilises colorimetric changes in a chemical layer, triggering an alarm if a colour change occurs. 3 The fact that this type of CO detector is relatively cheap is an anomaly compared to most commercially available, low concentration detection systems.…”

Section: Introductionmentioning

confidence: 99%

Conducting polymer percolation gas sensor on a flexible substrate

et al. 2020

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“…− Sensors Fabricated with Transition Metal Complexes Transition metal complexes, such as iron pincer complexes [63], rhodium complexes [38,[64][65][66], and rhenium-iridium complexes [67], exhibit significant color changes sensible to naked eyes when they are exposed to CO. The color change is believed to be the result of the formation of CO coordinates by replacing the weakly bound donor ligands of the complexes with CO molecules [64,65,67]. Compared with the previous two types of optical CO sensing materials, transition metal complexes can detect CO under room temperature with measurement results sensible to human eyes [38,63,64].…”

Section: Colorimetric Sensorsmentioning

confidence: 99%

Review of Dissolved CO and H2 Measurement Methods for Syngas Fermentation

Dang

Wang

Atiyeh

2021

Sensors

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Syngas fermentation is a promising technique to produce biofuels using syngas obtained through gasified biomass and other carbonaceous materials or collected from industrial CO-rich off-gases. The primary components of syngas, carbon monoxide (CO) and hydrogen (H2), are converted to alcohols and other chemicals through an anaerobic fermentation process by acetogenic bacteria. Dissolved CO and H2 concentrations in fermentation media are among the most important parameters for successful and stable operation. However, the difficulties in timely and precise dissolved CO and H2 measurements hinder the industrial-scale commercialization of this technique. The purpose of this article is to provide a comprehensive review of available dissolved CO and H2 measurement methods, focusing on their detection mechanisms, CO and H2 cross interference and operations in syngas fermentation process. This paper further discusses potential novel methods by providing a critical review of gas phase CO and H2 detection methods with regard to their capability to be modified for measuring dissolved CO and H2 in syngas fermentation conditions.

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“…Finally, Courbat et al developed a colorimetric CO sensor based on a rhodium complex [ 88 ]. The sensor relied on the chemochromic properties of the reagent when exposed to CO: its color changed from purple to yellow when CO concentration level increases.…”

Section: Fire Detectors Exclusively Based On Chemical Sensingmentioning

confidence: 99%

Chemical Sensor Systems and Associated Algorithms for Fire Detection: A Review

Fonollosa

Solórzano

Marco

2018

Sensors

118

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Indoor fire detection using gas chemical sensing has been a subject of investigation since the early nineties. This approach leverages the fact that, for certain types of fire, chemical volatiles appear before smoke particles do. Hence, systems based on chemical sensing can provide faster fire alarm responses than conventional smoke-based fire detectors. Moreover, since it is known that most casualties in fires are produced from toxic emissions rather than actual burns, gas-based fire detection could provide an additional level of safety to building occupants. In this line, since the 2000s, electrochemical cells for carbon monoxide sensing have been incorporated into fire detectors. Even systems relying exclusively on gas sensors have been explored as fire detectors. However, gas sensors respond to a large variety of volatiles beyond combustion products. As a result, chemical-based fire detectors require multivariate data processing techniques to ensure high sensitivity to fires and false alarm immunity. In this paper, we the survey toxic emissions produced in fires and defined standards for fire detection systems. We also review the state of the art of chemical sensor systems for fire detection and the associated signal and data processing algorithms. We also examine the experimental protocols used for the validation of the different approaches, as the complexity of the test measurements also impacts on reported sensitivity and specificity measures. All in all, further research and extensive test under different fire and nuisance scenarios are still required before gas-based fire detectors penetrate largely into the market. Nevertheless, the use of dynamic features and multivariate models that exploit sensor correlations seems imperative.

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A colorimetric CO sensor for fire detection

Cited by 18 publications

References 3 publications

Conducting polymer percolation gas sensor on a flexible substrate

Conducting polymer percolation gas sensor on a flexible substrate

Review of Dissolved CO and H2 Measurement Methods for Syngas Fermentation

Chemical Sensor Systems and Associated Algorithms for Fire Detection: A Review

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