On the use of the thermal wave resonator cavity sensor for monitoring hydrocarbon vapors

Authors
Lima, JAP Marin, E da Silva, MG Sthel, MS Cardoso, SL Takeuti, DF Gatts, C Vargas, H Rezende, CE Miranda, LCM
Citation
Jap. Lima et al., On the use of the thermal wave resonator cavity sensor for monitoring hydrocarbon vapors, REV SCI INS, 71(7), 2000, pp. 2928-2932
Citations number
12
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
REVIEW OF SCIENTIFIC INSTRUMENTS
ISSN journal
00346748 → ACNP
Volume
71
Issue
7
Year of publication
2000
Pages
2928 - 2932
Database
ISI
SICI code
0034-6748(200007)71:7<2928:OTUOTT>2.0.ZU;2-0
Abstract
A gas sensing device based on a thermal wave resonator cavity is outlined. It is experimentally tested by monitoring the presence of several hydrocarb on vapors in air via the measurement of the thermal diffusivity. It is also shown that its time-dependent response may be used to follow the vapor dif fusion. It is shown that its characteristic response time is linearly corre lated to the thermal diffusivity value of the mixture. The steps toward the development of a practical sensing device are further discussed. (C) 2000 American Institute of Physics. [S0034-6748(00)03107-5].