The PolySense team has just published  a new article on Frontiers in Environmental Chemistry Journal (IF 4.927)  reporting on a photoacoustic detection module based on a gold-plated photoacoustic cell aimed to measure hydrogen sulfide (H2S) gas in sewers.  A 1582 nm distributed feedback (DFB) diode laser was employed as the excitation light source of the photoacoustic Leggi di piùNew Publication on Frontiers in Environmental Chemistry[…]

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 Leggi di piùNew Publication on Photoacoustics Journal[…]

The PolySense team has just published  a new article on Optics Letters Journal  reporting on a novel clamp-type quartz tuning fork enhanced photoacoustic spectroscopy, by designing, realizing, and testing of clamp-type quartz tuning forks (QTFs) for photoacoustic gas sensing. This novel QTF design results in a more than ten times increase in the area available for Leggi di piùNew Publication on Optics Letters Journal[…]

The PolySense team has just published  a new article on Photoacoustics Journal Elsevier (IF 9.94)  reporting on a photoacoustic spectroscopy (PAS) based gas sensing approach exploiting acoustic resonator to enhance acoustic wave and optical resonator to enhance optical wave.  As demonstrator, we realized a sensor for acetylene (C2H2) detection achieved a noise equivalent absorption of 5.7 × 10− 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 an ultra-highly sensitive light-induced thermoelastic spectroscopy (LITES) based hydrogen chloride (HCl) sensor, exploiting a custom low-frequency quartz tuning fork (QTF) and a fiber-coupled multi-pass cell (MPC) with optical length of 40 m.  At an integration time of 200 Leggi di piùNew Publication on Photoacoustics Journal[…]

The PolySense team has just published  a new article on Frontiers in Environmental Chemistry Journal (IF 4.927)  reporting on an innovative sensor box employing two acoustic detection modules connected in series for quartz-enhanced photoacoustic multi-gas detection. To demonstrate the sensor versatility, simultaneous detection in air of methane and nitric oxide (NO), is reported. Minimum detection limits Leggi di piùNew Publication on Frontiers in Environmental Chemistry[…]

The PolySense team has just published  a new article on Applied Spectroscopy Review Journal Taylor and Francis (IF 5.917)  reporting on a review on the design of quartz tuning forks and their applications in quartz-enhanced photoacoustic spectroscopy (QEPAS)-based trace gas sensors. The manufacturing process of quartz tuning forks are explained in detail in this review and the Leggi di piùNew Publication on Applied Spectroscopy Review Journal[…]

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[…]