Design of a high-sensitivity differential Helmholtz photoacoustic cell and its application in methane detection.
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DOI: 10.1364/oe.465161
Abstract: A high-sensitivity differential Helmholtz photoacoustic cell based on multiple reflection was reported, and its performance parameters and gas replacement time were optimized by finite element simulation. To realize the long absorption path of the measured… read more here.
Keywords: helmholtz photoacoustic; high sensitivity; differential helmholtz; detection ... See more keywords
Near-infrared sensitive differential Helmholtz-based hydrogen sulfide photoacoustic sensors.
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DOI: 10.1364/oe.488835
Abstract: A near-infrared (NIR) sub-ppm level photoacoustic sensor for hydrogen sulfide (H2S) using a differential Helmholtz resonator (DHR) as the photoacoustic cell (PAC) was presented. The core detection system was composed of a NIR diode laser… read more here.
Keywords: hydrogen sulfide; differential helmholtz; near infrared; dhr ... See more keywords