Determination of Binary Gas Mixtures by Measuring the Resonance Frequency in a Piezoelectric Tube

• Published in: Sensors (Basel, Switzerland) Vol. 22; no. 4; p. 1691
• Main Authors: Keeratirawee, Kanchalar, Hauser, Peter C.
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 21.02.2022; MDPI
• Subjects: Acoustics; Approximation; Carbon dioxide; CO2; Communication; Gases; Nitrogen; resonance frequency shift; speed of sound; Ultrasonic transducers; Vibration; United States > US; Switzerland; Texas; speed of sound; O2; N2; resonance frequency shift; He; CO2

The composition of gas mixtures may be determined via changes of the speed of sound. As this affects the resonance frequency of the gas inside a tube, indirect measurements through a frequency analysis are also possible. It is demonstrated that this may be carried out with unprecedented simplicity b...