Results 231 to 240 of about 3,296,247 (272)
Biomimetic Gradient Porous Core-Shell Fibers with Enhanced Gas Sensing for CO-Temperature Dual-Mode Early Fire Warning. [PDF]
Nanomicro LettHuang L +9 more
europepmc +1 more source
Operational mechanisms and application advances in artificial olfactory systems. [PDF]
Biomed Eng OnlineWang C +6 more
europepmc +1 more source
MIR Photoacoustic Trace Gas Sensing Using a Miniaturized 3D Printed Gas Cell
Advanced Photonics 2015, 2015 A miniaturized 3D printed photoacoustic trace gas sensor is presented, using a mid-infrared QCL at 5.26µm as excitation source. Its performance for sensing CH4 resulted in a normalized noise equivalent absorbance of 7.7·10-9cm-1WHz-½.
Bauer, Ralf +3 more
core +11 more sources
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Low-power wireless trace gas sensing network
Proceedings of SPIE, 2011A basic wireless laser spectroscopic sensor network for monitoring of trace-gases will be presented. The prototype lowpower sensor nodes targeting carbon dioxide are based on tunable diode laser absorption spectroscopy and operate using a 2 μm VCSEL and a 3.5 m Herriott multi-pass cell.
Mark Zondlo +2 more
exaly +2 more sources
Mitigation of atmospheric uncertainty for improved trace-gas remote sensing
Multispectral and Hyperspectral Remote Sensing Instruments and Applications II, 2005Passive multi-spectral and hyper-spectral optical sensors offer great potential for remote-sensing in general and detection of low-concentration toxic species in particular. Correction for propagation through the intervening atmosphere (with molecular, aerosol and hydrosol constituents) is often the performance-limiting factor, a step which is ...
Joseph G. Shanks, Andrey Dudkin
exaly +2 more sources
Selectivity in trace gas sensing: recent developments, challenges, and future perspectives
The Analyst, 2022Selectivity is one of the most crucial figures of merit in trace gas sensing, and thus a comprehensive assessment is necessary to have a clear picture of sensitivity, selectivity, and their interrelations in terms of quantitative and qualitative views.
Puspendu Barik, Manik Pradhan
openaire +2 more sources
Broadband Femtosecond Sources for Greenhouse Gas Spectroscopy and Trace-Gas Sensing
Renewable Energy and the Environment, 2011We describe several approaches for producing broadband femtosecond sources in the mid-infrared for applications in atmospheric spectroscopy. Using a 3.3 µm source, measurements of CH4 and H2O concentrations in atmospheric conditions are described.
Neely, Tyler +4 more
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Remote Sensing and Trace Gas Fluxes
1990Most of the chapters in this volume emphasize the dynamics of energy, water, and carbon at the surface of the earth. These are major processes in the metabolism of the planet, and it is reasonable to expect that thermal and optical remote sensing could detect at least energy transformations rather directly.
Pamela A. Matson, Peter M. Vitousek
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Optical Frequency Comb Generators for Trace Gas Sensing
Frontiers in Optics 2015, 2015Optical frequency comb generators for rapidly re-configurable trace gas sensing are demonstrated using high-bandwidth low-Vπ electro-optic modulators and rapid-scanning microwave sources. These compact devices perform sensitive dual-comb spectroscopy with user-defined line spacing.
Adam J. Fleisher +5 more
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Perspectives of laser-photoacoustic spectroscopy in trace gas sensing
Journal de Physique IV (Proceedings), 2005Laser-based sensing techniques are attracting great interest in various fields of application, notably in trace gas monitoring and analysis. Among various detection schemes, photoacoustic monitoring offers some unique features. The performance of a laser-photoacoustic system crucially depends on the availability of appropriate laser sources, modulation
M. W. Sigrist, C. Fischer
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