Compact sensor for methane detection in the mid infrared region based on Quartz Enhanced Photoacoustic Spectroscopy

Triki, Meriam; Ba, T. Nguyen; Vicet, A.

doi:10.1016/j.infrared.2015.01.016

Cited by 39 publications

(18 citation statements)

References 31 publications

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“…A 1.53 µm continuous wave, distributed feedback (CW-DFB) fiber-coupled diode laser (Agilecom Photonics Solutions, China) was used as the laser excitation source. A commercially available QTF with a resonance frequency f 0 of ~32.76 kHz is typically employed in many QTF based sensors [20][21][22][23][24]. In order to improve the signal amplitude a QTF with f 0 of 30.72 kHz (Jingyuxing Technology, China) was utilized, since the effective integration time of the QTF is inversely proportional to its resonant frequency [25].…”

Section: Methodsmentioning

confidence: 99%

Quartz-tuning-fork enhanced photothermal spectroscopy for ultra-high sensitive trace gas detection

et al. 2018

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A gas sensing method based on quartz-tuning-fork enhanced photothermal spectroscopy (QEPTS) is reported in this paper. Unlike usually used thermally sensitive elements, a sharply resonant quartz-tuning-fork with the capability of enhanced mechanical resonance was used to amplify the photothermal signal level. Acetylene (C 2 H 2) detection was used to verify the QEPTS sensor performance. The measured results indicate a minimum detection limit (MDL) of 718 ppb and a normalized noise equivalent absorption coefficient (NNEA) of 7.63 × 10 −9 cm −1 W/√Hz. This performance demonstrates that QEPTS can be an ultra-high sensitive technique for gas detection and shows superiority when compared to usually used methods of tunable diode laser absorption spectroscopy (TDLAS) and quartzenhanced photoacoustic spectroscopy (QEPAS). Furthermore, when compared to an optical detector, especially a costly mercury cadmium telluride (MCT) detector with cryogenic cooling used in TDLAS, a quartz-tuning-fork is much cheap and tiny. Besides, compared to the QEPAS technique, QEPTS is a non-contact measurement technique and therefore can be used for standoff and remote trace gas detection.

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Section: Methodsmentioning

confidence: 99%

Quartz-tuning-fork enhanced photothermal spectroscopy for ultra-high sensitive trace gas detection

et al. 2018

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“…The high Q-factor (~100,000 in a vacuum and~10,000 in a standard atmosphere pressure) and narrow resonance frequency band (<1 Hz) of QTF improve the QEPAS selectivity and immunity to environmental acoustic noise [13][14][15][16][17][18][19]. Due to the merits of high selectivity and sensitivity, low cost, compactness, and a large dynamic range, QEPAS sensors have been widely applied in gas detection for atmospheric monitoring [20][21][22][23][24][25][26][27], chemical analysis [28][29][30][31][32], biomedical diagnostics [33][34][35][36], and trace gas sensing [37][38][39][40][41][42][43][44]. Different QEPAS sensor architectures were developed to meet the requirements of a large number of applications.…”

Section: Introductionmentioning

confidence: 99%

Review of Recent Advances in QEPAS-Based Trace Gas Sensing

2018

Applied Sciences

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Quartz-enhanced photoacoustic spectroscopy (QEPAS) is an improvement of the conventional microphone-based photoacoustic spectroscopy. In the QEPAS technique, a commercially available millimeter-sized piezoelectric element quartz tuning fork (QTF) is used as an acoustic wave transducer. With the merits of high sensitivity and selectivity, low cost, compactness, and a large dynamic range, QEPAS sensors have been applied widely in gas detection. In this review, recent developments in state-of-the-art QEPAS-based trace gas sensing technique over the past five years are summarized and discussed. The prospect of QEPAS-based gas sensing is also presented.

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“…CH 4 is also an industrial safety hazard, especially in the coal mining industry and in the handling of liquefied CH 4 . Hence the development of a real-time, portable, reliable sensor system for monitoring CH 4 concentration level in urban and rural areas is important [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Development and field deployment of a mid-infrared methane sensor without pressure control using interband cascade laser absorption spectroscopy

Zheng

Sanchez

et al. 2017

Sensors and Actuators B: Chemical

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A mid-infrared methane (CH 4 ) sensor without pressure control was developed using a continuous-wave (CW) interband cascade laser (ICL) for targeting a CH 4 absorption line located at 3038.5 cm -1 . A multi-pass gas cell with an absorption path length of 54.6 m was utilized for enhancing gas absorption.The pressure inside the MPGC was measured using direct Lorentzian absorption fitting for the compensation of CH 4 concentration changes resulting from pressure variations. Laboratory pressure calibration was conducted in the range of 25 − 800 Torr using 1.3-, 1.5-, 1.7-and 2.1-ppmv CH 4 samples.A pressure precision of ~ 1.65 Torr with a ~ 2.5-s averaging time was achieved based on the measurement of a 2.1-ppmv CH 4 sample at 700-Torr. Concentration level measurements of a 2.1-ppmv CH 4 sample at a 700-Torr pressure yielded an Allan deviation of 2.25 ppbv for an averaging time of 2.5 s.The sensor functioned normally with CH 4 samples at 1.0, 1.2, 1.4, 1.6 and 2.1 ppmv concentration levels as the pressure changes from 25 to 800 Torr. Indoor/outdoor CH 4 concentration measurements on the Rice University campus and a field campaign in the Greater Houston Area (GHA) were conducted to evaluate the performance of the sensor system.

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Compact sensor for methane detection in the mid infrared region based on Quartz Enhanced Photoacoustic Spectroscopy

Cited by 39 publications

References 31 publications

Quartz-tuning-fork enhanced photothermal spectroscopy for ultra-high sensitive trace gas detection

Quartz-tuning-fork enhanced photothermal spectroscopy for ultra-high sensitive trace gas detection

Review of Recent Advances in QEPAS-Based Trace Gas Sensing

Development and field deployment of a mid-infrared methane sensor without pressure control using interband cascade laser absorption spectroscopy

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