The PolySense team has just published a new article on International Journal of Hydrogen Energy – Elsevier (IF 9.1) reporting on a custom quartz tuning fork (QTF) as sensor for the detection of high concentrations of hydrogen in air. Exciting the fundamental flexural mode of a commercially available 12.4 kHz-QTF, we demonstrated the linear dependence of its resonance frequency and quality factor on the H2 concentration, passing through their relationship with molar mass and the viscosity of air mixture. Monitoring the shift of the resonance frequency of the QTF, the H2-component in air can be estimated with a precision level of 0.74% and accuracy error of 1.82%. Finally, a beat-frequency approach was proposed to speed up the acquisition in few seconds, monitoring both resonance parameters of the QTF.
The following link provides access to the article:
http://polysense.poliba.it/wp-content/uploads/2024/12/QTF-Hydrogen-sensor_IJHE_2024.pdf
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