Yang, XiaotaoXiao, YouhongMa, YufeiHe, YingTittel, Frank K.2017-08-092017-08-092017Yang, Xiaotao, Xiao, Youhong, Ma, Yufei, et al.. "A Miniaturized QEPAS Trace Gas Sensor with a 3D-Printed Acoustic Detection Module." <i>Sensors,</i> 17, no. 8 (2017) MDPI: https://doi.org/10.3390/s17081750.https://hdl.handle.net/1911/96636A 3D printing technique was introduced to a quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor and is reported for the first time. The acoustic detection module (ADM) was designed and fabricated using the 3D printing technique and the ADM volume was compressed significantly. Furthermore, a small grin lens was used for laser focusing and facilitated the beam adjustment in the 3D-printed ADM. A quartz tuning fork (QTF) with a low resonance frequency of 30.72 kHz was used as the acoustic wave transducer and acetylene (C2H2) was chosen as the analyte. The reported miniaturized QEPAS trace gas sensor is useful in actual sensor applications.engThis is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).Journal article3D printingC2H2 quantificationQEPASminiaturizationMiniaturized_QEPAS_Trace_Gas_Sensorhttps://doi.org/10.3390/s17081750