Applications of quartz tuning forks in spectroscopic gas sensing

By A. Kosterev, Frank K. Tittel, D. Serebryakov, A. Malinovsky, I. Morozov. 2005

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Optical gas sensing: a review (2012, background): “the QTF is detected using a transimpedance amplifier, giving a normalized αmin in the range 10−8–10−9 cm−1 W Hz−1/2 [334, 335].”
Analysis of the electro-elastic properties of custom quartz tuning forks for optoacoustic gas sensing (2016, methodology): “, sensors in atomic force AFM) [1–5] and near-field optical microscopy [6]; optoacoustic as sensing [7,8]; gas pressure, density and viscosity determination 9]; high-resolution measurements of acceleration and velocity for ccelerometers and gyroscopes [10] have been reported.”
Recent Progress on Infrared Photoacoustic Spectroscopy Techniques (2011, methodology): “In case of QEPAS, an Allan variance analysis of QEPAS data was performed to determine the limits of SNR improvement with averaging time (154) (Figure 4).”
Recent advances in quartz-enhanced photoacoustic sensing (2017, positive): “QEPAS exploits a quartz tuning fork (QTF) that converts the acoustic wave into an electrical signal via the piezoelectric effect [2-5].”