New optical sensor for volatile organic compounds (VOC) using birefringent porous glass

Pinet, Éric; Vachon-Savary, M.; Dube, S. K.

doi:10.1109/icsens.2004.1426418

Cited by 2 publications

(4 citation statements)

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“…Initial light intensity of each RGB color was set to a predetermined value (selected according to transmission pattern) and was constant during the whole experiment. Light intensity variation was thus only due to shifts in the transmitted spectra of the OAT-TS sensor in response to solvent vapor detection [3,8].…”

Section: Oat-dl Signal Conditionermentioning

confidence: 99%

“…Such changes in the porous sensing material could advantageously be evaluated using optical methods. Interesting approaches for solvent detection have been proposed using either porous silicon [1,2] or porous glass [3,4]. However, there are still few publications describing the use of optical sensors for solvent detection integrated inside organic vapor cartridges.…”

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confidence: 99%

“…Results and Discussion In the past we presented work showing that birefringent porous glass could be used for volatile organic compound detection [3,8]. The porous structure of the glass (with pore diameters ranging from 2 nm up to >60 nm) was proven to have the ability to condense solvent vapors that in turn changed the optical anisotropic properties of the material.…”

mentioning

confidence: 99%

“…The presence of activated carbon surrounding the OAT-TS sensor is an ideal medium since it protects porous glass from possible contaminations. Since birefringent porous glass that we developed could detect indifferently all tested organic solvents [3,8] and due to the fact that its physical structure is similar to that of activated carbon, the use of the optical anisotropy technology described in this paper is probably an ideal situation for a commercially successful broadband solvent sensor that could be used as an ESLI for respiratory cartridges.…”

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confidence: 99%

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Birefringent Porous Glass Fiber-Optic Sensor as a Low-Cost End-of-Service-Life Indicator (ESLI) for Organic Vapor Respiratory Cartridges

Pinet

Côté

2006

Optical Fiber Sensors

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Birefringent porous glass integrated between two plastic optical fibers terminated by crossed Polaroid™ films was used as a low-cost end-of-service-life indicator (ESLI) for organic vapor cartridges. Birefringence is significantly reduced when volatile compounds condense into the anisotropic porous structure. Such changes could easily be quantified using a low-cost light source and detector and very simple light intensity analysis. We showed that such sensors integrated into an experimental organic vapor cartridge could easily detect the progression of low concentrations of solvents (such as 50 ppm of toluene) into the activated charcoal cartridge and thus truly be used as an ESLI. Since such robust sensors could detect broadband solvents by simple physical condensation similar to the trapping phenomena of activated carbon, they are probably ideal candidates for such application.

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Section: Oat-dl Signal Conditionermentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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