Dynamic thermal conductivity sensor for gas detection

Tardy, Pascal; Coulon, Jean-René; Lucat, Claude; Ménil, Francis

doi:10.1016/j.snb.2003.09.019

Cited by 71 publications

(38 citation statements)

References 8 publications

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“…L 1 , L 2 , and L 3 are in a plane, and L 2 and L 3 are parallel to each other and spreading obliquely. L 2 and L 3 pass through the triangular reflecting prism and form L 4 and L 5 . L 4 and L 5 form new planes, after which they are superimposed by the refracting prism to produce the interference fringes.…”

Section: Three-dimensional Optical Path Modelmentioning

confidence: 99%

“…Catalytic combustion methane sensor uses the resistance of the detection element to reflect the heat that is produced by the oxidation-reduction reaction [2,3]. The thermal conductivity methane sensor makes use of the difference in thermal conductivity between methane and air to obtain the electrical signals [4,5]. The detection principle of gas sensitive methane sensor is that the resistivity of metal oxide changes significantly when the metal oxide is adsorbed on different gases [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Analysis and Design of an Effective Light Interference Methane Sensor Based on Three-Dimensional Optical Path Model

Long

Yang

et al. 2018

Journal of Sensors

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As an important environmental monitoring equipment, the existing methane sensors or the traditional interferometer-based methane detectors have some drawbacks, such as low accuracy, large size, and complex calibration operations. Moreover, the optical path model and analysis method for the light interference methane sensor are not practical. In this paper, an effective light interference methane sensor is proposed based on a three-dimensional optical path model with point light source. Based on this model, the interference optical system is studied to illustrate the cause of the interference fringes. Furthermore, the influencing factors of the light intensity distribution are analyzed and an adjustment method for the interference fringes is proposed, which helps to simplify the assembling and calibrating operations. In order to improve the measurement accuracy, a temperature drift compensation method which includes a mapping table, a steady-state compensator, and a dynamic compensator is proposed. The mapping table is established between the output voltages of photoelectric detector, and the methane concentration, the steady-state compensator, and the dynamic compensator are proposed to eliminate the temperature drift. Finally, an experimental device for the light interference methane sensor is constructed to validate the interference fringe adjustment method and the temperature drift compensation method.

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Section: Three-dimensional Optical Path Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis and Design of an Effective Light Interference Methane Sensor Based on Three-Dimensional Optical Path Model

Long

Yang

et al. 2018

Journal of Sensors

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“…A variety of fluorophores have been proposed as framework for the chemosensor design strategy, which may include anthracene 1, coumarin 2, naphthalimine 3, BODIPY 4, fluorescein 5, rhodamine 6 and cyanin 7 (Table 1 and Figure 3). All these fluorophores have been widely employed and applied as reporters in each systematic structure due to the various choice of emission wavelength [40].…”

Section: Plausible Materialsmentioning

confidence: 99%

Fluorescent Chemosensor for Quantitation of Multiple Atmospheric Gases

Bhopate¹,

Kim²,

Pg³

et al. 2017

J Nanomed Nanotechnol

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“…The most common gas sensors are based on chemical interaction [2]. These sensors measure a change in the conductance or other physical property between the gas and the sensing material during gas interaction [3]. These sensors have a high sensitivity [4].…”

Section: Introductionmentioning

confidence: 99%

“…These sensors have a high sensitivity [4]. However, they are not reliable in long-term use, because of chemical contamination of the sensing part [3,5].…”

Section: Introductionmentioning

confidence: 99%

Flow compensation in a MEMS dual-thermal conductivity detector for hydrogen sensing in natural gas

Graaf

Prouza

Wolffenbuttel

2015

2015 Transducers - 2015 18th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS)

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Conventional thermal conductivity detectors (TCDs) demonstrate a flow dependence. The approach presented here to reduce the flow dependence is based on the on-line flow compensation using two thin-film sensors on membranes in parallel on the same chip that are differentially operated. These are laterally identically, but with a different depth of the detection chamber, resulting in different quasi-static sensitivities to the thermal conductivity of the sample gas. The effects of conduction and convection in the structure have been studied using COMSOL Multiphysics. First prototypes have been fabricated and are presently tested.

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Dynamic thermal conductivity sensor for gas detection

Cited by 71 publications

References 8 publications

Analysis and Design of an Effective Light Interference Methane Sensor Based on Three-Dimensional Optical Path Model

Analysis and Design of an Effective Light Interference Methane Sensor Based on Three-Dimensional Optical Path Model

Fluorescent Chemosensor for Quantitation of Multiple Atmospheric Gases

Flow compensation in a MEMS dual-thermal conductivity detector for hydrogen sensing in natural gas

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