The PolySense team has just published a new article on Photoacoustics Journal reporting on multi-gas QEPAS detection of methane and nitrous oxide using a quantum cascade laser array. A methane detection sensitivity of 200 ppb and 60 ppb for nitrous oxide were achieved with a 10 s lock-in integration time.
The following link provide access to the article.
http://polysense.poliba.it/wp-content/uploads/2020/01/112_CH4-N2O-QCL-array_Photoacoustics_2020.pdf
