The PolySense team has just published a new article on Photoacoustics Journal Elsevier (IF 9.94) reporting on a on a gas sensor based on quartz-enhanced photoacoustic spectroscopy (QEPAS) able to detect multiple gas species for environmental monitoring applications, by exploiting a Vernier effect-based quantum cascade laser as the excitation source. The sensor was calibrated with certified concentrations of CO, N2O and CO2 in a wet nitrogen matrix. Minimum detection limits of 6 ppb, 7 ppb, and 70 ppm were achieved for CO, N2O and CO2, respectively, at 100 ms of integration time. As proof of concept, the QEPAS sensor was tested by continuously sampling indoor laboratory air and monitoring the analytes concentrations.
The following link provides access to the article:
http://polysense.poliba.it/wp-content/uploads/2022/09/147-QEPAS-Vernier-QCL_2022.pdf
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