Fiber-optic photoacoustic (PA) sensing has important applications in trace gas detection.
The fiber-optic Fabry-Perot acoustic sensor implemented applying a cantilever is a novel …

A high-sensitivity photoacoustic spectroscopy (PAS) sensor based on differential Helmholtz
photoacoustic cell (DHPAC) with dense spot pattern is reported in this paper for the first time …

A multi-component Freon gas sensing system was developed based on the non-dispersive
infrared (NDIR) spectroscopy, which had the advantages of simple structure and low cost …

Greenhouse gas (GHG) detection plays an important role in climate change research and
industry applications. A novel photoacoustic spectroscopy (PAS) sensor based on multiple …

A photoacoustic spectroscopy (PAS) based on vertical cruciform multi-stepped
photoacoustic cell (CMS-PAC) was developed to achieve highly sensitive detection of trace …

A linear spot-type multipass cell-enhanced fiber-optic photoacoustic gas microprobe is
proposed. To further reduce the volume of the gas chamber and enhance the photoacoustic …

Carbon monoxide (CO), as an indicator gas for fault diagnosis of gas-insulated switchgear,
has the strongest absorption coefficient in the mid-infrared region, making Fourier transform …

In this paper, a highly sensitive methane (CH 4) sensor based on tunable diode laser
absorption spectroscopy (TDLAS) with 3D-printed multi-pass cell (MPC) is reported. A MPC …

A high-sensitivity fiber-optic photoacoustic (PA) gas microsensor is demonstrated with dual
enhancement based on acoustics and detection. Due to the characteristic of small size, a …

The water vapor in the ambient air affects the accuracy of the photoacoustic (PA) dissolved
gas analysis system for transformer health monitoring. A laser PA system was evaluated by …