De Palo Raffaele, Ardito Nicoletta, Zifarelli Andrea, Sampaolo Angelo, Giglio Marilena, Patimisco Pietro, Ranieri Ezio, Weih Robert, Nauschütz Josephine, König Oliver, Spagnolo Vincenzo
PolySense Lab, Dipartimento Interateneo di Fisica, University and Polytechnic of Bari, Via Amendola 173, 70126 Bari, Italy.
PolySense Innovations srl, Via Amendola 173, 70126 Bari, Italy.
Sensors (Basel). 2025 Apr 12;25(8):2442. doi: 10.3390/s25082442.
This study presents the performance of a multi-gas sensor for greenhouse detection based on quartz-enhanced photoacoustic spectroscopy (QEPAS). The QEPAS sensor exploits an innovative, compact three-wavelength laser module as excitation source. The module integrates three interband cascade laser chips with a beam combining system, all enclosed in a compact metallic package with sizes of 40 × 52 × 17 mm to generate a single output beam. The multi-gas QEPAS sensor was tested in a laboratory environment for the sequential detection of two greenhouse gases, methane (CH) and carbon dioxide (CO), and a precursor greenhouse gas, carbon monoxide (CO). At an integration time of 100 ms, minimum detection limits of 21 ppb, 363 ppb, and 156 ppb, were estimated for CH, CO and CO detection, respectively, all well below their natural abundance in air.
本研究展示了一种基于石英增强光声光谱（QEPAS）的用于温室气体检测的多气体传感器的性能。该QEPAS传感器采用了一种创新的紧凑型三波长激光模块作为激发源。该模块将三个带间级联激光芯片与一个光束组合系统集成在一起，全部封装在一个尺寸为40×52×17毫米的紧凑型金属封装中，以产生单束输出光束。该多气体QEPAS传感器在实验室环境中进行了测试，用于顺序检测两种温室气体，即甲烷（CH₄）和二氧化碳（CO₂），以及一种温室气体前体一氧化碳（CO）。在积分时间为100毫秒时，CH₄、CO₂和CO的最低检测限分别估计为21 ppb、363 ppb和156 ppb，均远低于它们在空气中的自然丰度。
