Sensitivity of fiber-optic carbon dioxide sensors utilizing indicator dye

Segawa, Hiroyo; Ohnishi, Eiji; Arai, Yasuhiko; Yoshida, Kazuo

doi:10.1016/s0925-4005(03)00372-1

Cited by 54 publications

(44 citation statements)

References 14 publications

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“…Optical-fiber-based CO 2 sensors have been fabricated by several researchers (Colin et al 2003;Segawa et al 2003;Nakamura and Amao 2003) using materials showing absorbance or reflectance changes on exposure to CO 2 . The sensing elements such as pH indicating organic dyes or organometallic complexes supported in gas-permeable polymer films have been used.…”

Section: Fiber Optic Co 2 Sensorsmentioning

confidence: 99%

Carbon Dioxide (CO2) Sensors for the Agri-food Industry—A Review

Neethirajan

Jayas

Sadistap

2008

Food Bioprocess Technol

276

134

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In the food and agricultural industry, sensors are being used for process control, monitoring quality, and assessing safety. There is a growing demand for carbon dioxide (CO 2 ) sensors in the bulk food storage sector, because CO 2 sensors can be used to detect incipient spoilage and to assess CO 2 levels in modified-atmosphere packages and storage structures. The market potential for reliable and inexpensive CO 2 sensors is huge because of a wide range of applications in the agri-food industry. This review synthesizes information about the types of CO 2 sensors, analyzes their detection processes, provides a broad overview of the innovative research on the development of sensors, sensing mechanisms, and their characteristics, and outlines future possibilities for use of CO 2 sensors.

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Section: Fiber Optic Co 2 Sensorsmentioning

confidence: 99%

Carbon Dioxide (CO2) Sensors for the Agri-food Industry—A Review

Neethirajan

Jayas

Sadistap

2008

Food Bioprocess Technol

276

134

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“…Segawa et al prepared carbon dioxide sensors by dip coating unclad optical fibers with a sol-gel film containing the dye thymol blue. 69 This dye proved to be more sensitive than CO 2 sensors made out of phenolphthalein dyes on the order of <2 min detection time on 100% CO 2 presence. The dyes were found to be more sensitive with the increase of humidity, dye concentration, and ratio of sol-gel chemical constituents.…”

Section: Fluorescent Dyesmentioning

confidence: 90%

Enabling Sensor Technologies for the Quantitative Evaluation of Engineered Tissue

Starly

Choubey

2007

Ann Biomed Eng

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Research in regenerative medicine has necessitated the need for advanced sensing technologies to monitor and evaluate the quality of engineered tissues. Several sensing schemes have been developed to sense specific analytes that enable researchers to assess tissue morphology, growth, and function. In addition to microscopy and staining techniques, tissue engineers are presented with an array of optical, chemical, and biological sensor technologies, which provide them with an opportunity to monitor variables, such as oxygen concentration, pH value, carbon dioxide, and glucose concentration in a noninvasive or minimally invasive manner. The article presents a short description on the core technologies and research reviews on the use of sensors employed in tissue engineering over the past decade. The article concludes by presenting some of the challenges to the further development of these technologies that are capable of real time measurement of tissue structure, composition, and function both for in-vitro and in-vivo analysis.

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“…At this time, no commercial solution is enough efficient to ensure a really helpful CO 2 detection for several reasons: cost, versatility, aging, instantaneous response, temperature robustness, etc. Although several methods have proven to be efficient for the CO 2 sensing, such as by means of a fiber with a dip coated sensitive film containing the CO 2 indicator or fiber tips combined with capillary reservoirs, a method widely used for the carbon dioxide monitoring in classical condition is a technology based on the optical absorption of CO 2 around 4.3 m [1][2][3]. Thus, the CO 2 concentration can be deduced by measuring the transmission at this middle infrared (mid-IR) wavelength through a CO 2 cell.…”

Section: Introductionmentioning

confidence: 99%

Mid-IR optical sensor for CO2 detection based on fluorescence absorbance of Dy3+:Ga5Ge20Sb10S65 fibers

Starecki

Charpentier

Doualan

et al. 2015

Sensors and Actuators B: Chemical

116

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International audienceThe Dy3+ doped Ga5Ge20Sb10S65 bulk glass provides good emission efficiency in the middle IR with a better brightness than the blackbody sources. Sulfide single index fibers doped with Dy3+ (500-3000 ppm) were drawn with optical attenuation of about 1-3 dB/m, suitable to develop fluorescence sources for chem. anal. by optical absorption in middle IR. They particularly present a broad emission around 4-5 μm, making them attractive for CO2 detection. Considering the low cost and efficient Dy3+ pumping scheme by means of a com. laser diode, the Dy3+ sulfide fiber reveals potential for developing a CO2 optical sensor. Using the 4.35 μm broad emission of a Dy3+ doped Ga5Ge20Sb10S65 fiber combined with a differential measurement technique, the CO2 gas concn. measurement was carried out fruitfully. For this specific application, the CO2 detection threshold was fixed at about 400 ppm corresponding to atm. concn. and was successfully reached for a cell length of 1.5 cm with a resoln. of about 5%. The sensitivity of the setup is mainly related to the size of the cell, deliberately reduced to develop a robust and compact system for natural geol. sites

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Sensitivity of fiber-optic carbon dioxide sensors utilizing indicator dye

Cited by 54 publications

References 14 publications

Carbon Dioxide (CO2) Sensors for the Agri-food Industry—A Review

Carbon Dioxide (CO2) Sensors for the Agri-food Industry—A Review

Enabling Sensor Technologies for the Quantitative Evaluation of Engineered Tissue

Mid-IR optical sensor for CO2 detection based on fluorescence absorbance of Dy3+:Ga5Ge20Sb10S65 fibers

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