2022
DOI: 10.3390/s22041691
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Determination of Binary Gas Mixtures by Measuring the Resonance Frequency in a Piezoelectric Tube

Abstract: 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 by the novel employment of a piezoelectric tube which serves at the same time as a resonance tube and as transducer into the electronic domain. Experiments were run using a simple diecast aluminum box as the measurin… Show more

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Cited by 4 publications
(3 citation statements)
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“…Method Detection Performance [3] Surface plasmon resonance 100% He [4] Resonance frequency change 90% [6] Band gap change NA [7] Carbon nanotubes emissions 10 −8 Pa•L/s [8] Thermal conductivity 700 PPM [9] Open circuit voltage of helium ionization 53 PPM [10] Thermal conductivity (acoustic) 10 −4 cm 3 /s [10] Speed of sound 10 −5 cm 3 /s [11] Thermal conductivity 5%…”
Section: Referencementioning
confidence: 99%
See 1 more Smart Citation
“…Method Detection Performance [3] Surface plasmon resonance 100% He [4] Resonance frequency change 90% [6] Band gap change NA [7] Carbon nanotubes emissions 10 −8 Pa•L/s [8] Thermal conductivity 700 PPM [9] Open circuit voltage of helium ionization 53 PPM [10] Thermal conductivity (acoustic) 10 −4 cm 3 /s [10] Speed of sound 10 −5 cm 3 /s [11] Thermal conductivity 5%…”
Section: Referencementioning
confidence: 99%
“…For example, phase interference surface plasmon resonance that depends on the gas refractive index was used to measure helium [3]. The detection of helium in the air was also proposed and accomplished by measuring the changes in resonance frequency based on gas mixtures in a tube [4]. Hydrated vanadium pentoxide V 2 O 5 •1.6 H 2 O nanostars were also proposed as a potential helium-sensing material at room temperature because their resistance decreases with the presence of helium [5].…”
Section: Introductionmentioning
confidence: 99%
“…Any other species which may be present in higher concentration are assumed to be not interacting with either the adsorbate or the adsorbent. This kind of analysis has been used before in experiments for sensing gases in binary mixtures. Thus, we wanted to clarify that our system does not take into account any other species which might be interacting with the adsorbate or the adsorbent. Therefore, this is a simple approach to find the selectivity using the Henry’s constants for a specific mixture-adsorbent combination geared toward a simple sensor design.…”
Section: Introductionmentioning
confidence: 99%