The PolySense team has just published  a new article on Photoacoustics Journal Elsevier (IF 8.48)  reporting on a QEPAS sensor system for exhaled ammonia (NH3) monitoring. A NH3 minimum detectable concentration of 14 ppb at 1 s averaging time was achieved.  Continuous measurements of the NH3 level exhaled by 3 healthy volunteers was carried out to Leggi di piùNew Publication on Photoacoustics Journal[…]

Researchers from China and Italy have developed a highly sensitive and selective optical sensor using quartz-enhanced photoacoustic spectroscopy (QEPAS) for carbon monoxide (CO) detection in sulfur hexafluoride (SF6 ) decomposition. High-voltage apparatuses, utilizing SF6 as gas-insulating medium, require rapid and continuous monitoring. Detecting CO as one of the SF6 decomposition products allows early diagnosis of Leggi di piùCO Detection in SF6 Using Quartz-enhanced Photoacoustic Spectroscopy – a case study[…]

The PolySense team has just published  a new article on Photoacoustics Journal Elsevier (IF 8.48)  reporting on a quartz enhanced photoacoustic spectroscopy (QEPAS) sensor capable to detect high concentrations of methane (C1) and ethane (C2). In the concentration ranges under investigation (1%- 10% for C1 and 0.1%- 1% for C2), both linear and nonlinear responses of the Leggi di piùNew Publication on Photoacoustics Journal[…]

Polysense is proud to communicate that five team members have been listed in the 2020  Top 2% Scientists list in the world by Stanford University. In particular, Professors Vittorio Passaro and Vincenzo Spagnolo have been listed in the full career Top 2% Scientists list while Professors Vittorio Passaro, Vincenzo Spagnolo, Pietro Patimisco, Angelo Sampaolo and Marilena Giglio Leggi di piùPolysense Team members listed in the 2020 Top 2% Scientists in the world by Stanford University[…]

The PolySense team has just published  a new article on Photoacoustics Journal Elsevier (IF 8.48)  reporting on the realization of an intracavity QEPAS sensor for  CO, N2O and H2O detection, employing a quartz tuning fork with T-shaped prongs and a QCL operating at 4.59 µm. Exploiting a ~100 optical power amplification enabled by a high finesse cavity, Leggi di piùNew Publication on Photoacoustics Journal[…]

The Polysense team has just published  a new article on ACS Omega in collaboration with Saudi Aramco Company reporting on the performance of a compact and portable QEPAS system able to measurr concentrations of methane (C1), ethane (C2), and propane (C3) in gas phase within the percentage range that is typically encountered in natural gas samples from Leggi di piùNew Publication on ACS Omega[…]

The PolySense team has just published  a new article on Photoacoustics Journal Elsevier (IF 8.48)  reporting on the performance of quartz tuning fork (QTF) based laser spectroscopy sensing employing multiple QTFs. To avoid that resonance frequency mismatching of the QTFs degrades the sensor performance, two types of resonance frequency matching method are here proposed. Without regulation, Leggi di piùNew Publication on Photoacoustics Journal[…]

The PolySense team has just published  a new article on Photoacoustics Journal Elsevier (IF 8.48)  reporting on the realization of a compact quartz-enhanced photoacoustic sensor for ppb-level ambient NO2 detection exploiting a blue laser diode. A minimum detectable concentration (1σ) of 7.3 ppb with an averaging time of 1 s is achieved, which can be further improved to Leggi di piùNew Publication on Photoacoustics Journal[…]

The PolySense team has just published  a new article on Photoacoustics Journal Elsevier (IF 8.48)  reporting on the realization of an on-beam quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor based on a custom quartz tuning fork (QTF) with a resonance frequency of 28 kHz, acting as a photoacoustic transducer. H2O, C2H2 and CO2 were detected for a long time and Leggi di piùNew Publication on Photoacoustics Journal[…]