Results 91 to 100 of about 1,073 (164)

Measurement precision improving with adaptive Kalman filter for quartz-enhanced photoacoustic spectroscopy methane sensor

AIP Advances
Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS) has shown significant progress in trace gas sensing in recent years; however, its detection performance remains constrained by system noise.
Yu Zhou, Li Wang, Yingchao Xie, Hao Xiong, Qilei Zhang, Shenlong Zha   +5 more
doaj   +1 more source

Soot mass concentration sensor using quartz-enhanced photoacoustic spectroscopy [PDF]

In this work, a measurement setup for a miniaturized soot sensor with QEPAS is reported. Specifically, measurements of mass concentrations of soot from a miniCAST soot generator are compared with those from an MSS, which is a common method to measure ...

core   +1 more source

QEPAS gas sensors for air quality monitoring

, 2020
L’activité humaine, à l’échelle d’un particulier ou à l’échelle industrielle, libère de nombreuses molécules dans l’atmosphère. Même une petite quantité de certaines de ces molécules peut dégrader la qualité de l’air. Des capteurs de gaz sont donc essentiels pour mesurer la concentration de ces molécules dans l’environnement.
openaire   +1 more source

Quartz-Enhanced Photoacoustic Sensor Based on a Multi-Laser Source for In-Sequence Detection of NO₂, SO₂, and NH₃. [PDF]

Sensors (Basel), 2023
Patimisco P, Ardito N, De Toma E, Burghart D, Tigaev V, Belkin MA, Spagnolo V.   +6 more
europepmc   +1 more source

Multivariate analysis and digital twin modelling: Alternative approaches to evaluate molecular relaxation in photoacoustic spectroscopy. [PDF]

Photoacoustics, 2023
Zifarelli A, Cantatore AFP, Sampaolo A, Mueller M, Rueck T, Hoelzl C, Rossmadl H, Patimisco P, Spagnolo V.   +8 more
europepmc   +1 more source

Quartz-enhanced laser spectroscopy sensing. [PDF]

Light Sci Appl
Qiao S, Liu X, Lang Z, He Y, Chen W, Ma Y.   +5 more
europepmc   +1 more source

Quartz-Enhanced Photoacoustic Spectroscopy Assisted by Partial Least-Squares Regression for Multi-Gas Measurements. [PDF]

Sensors (Basel), 2023
Rasmussen AN, Thomsen BL, Christensen JB, Petersen JC, Lassen M.   +4 more
europepmc   +1 more source

Simultaneous Detection of ¹²CH₄, ¹³CH₄, and Related Isotope Ratio Exploiting a Frequency-Multiplexed Mid-Infrared Quartz-Enhanced Photoacoustic Sensor. [PDF]

ACS Sens
Olivieri M, Elefante A, Menduni G, Giglio M, Wu H, Dong L, Patimisco P, Spagnolo V, Sampaolo A.   +8 more
europepmc   +1 more source

Side-polished fiber evanescent wave quartz-enhanced photoacoustic spectroscopy employing dielectric coatings for evanescent field enhancement. [PDF]

Photoacoustics
Twomey CF, Biagi G, Ruth AA, Ali F, Di Falco A, O'Faolain L, Walsh AJ.   +6 more
europepmc   +1 more source

Miniaturized and highly-sensitive fiber-optic photoacoustic gas sensor based on an integrated tuning fork by mechanical processing with dual-prong differential measurement. [PDF]

Photoacoustics, 2023
Pan Y, Lu P, Cheng L, Li Z, Liu D, Zhao J, Wang Y, Fu L, Sima C, Liu D.   +9 more
europepmc   +1 more source