Title :
Sensitivity of a microwave differential technique for the measurement of contaminants in gases
Author :
Rouleau, J.F. ; Goyette, J. ; Bose, T.K. ; Frechette, M.F.
Author_Institution :
Inst. de Recherche sur Hydrogene, Trois-Rivieres, Que., Canada
Abstract :
A resonant-cavity based microwave differential technique has been developed for the detection of humidity in a gas in the low-ppm range. The determination of the contaminant content is related to the shift in the resonant frequency of a measuring cavity compared to a reference cavity. Preliminary measurements carried out on binary mixtures of nitrogen-sulfur hexafluoride (SF6) and nitrogen-water indicates a detection threshold below 10 ppm, which compares well with theoretical predictions
Keywords :
SF6 insulation; cavity resonators; gas mixtures; microwave devices; moisture measurement; nitrogen; N2-H2O; N2-H2O mixture; SF6-N2; SF6-N2 mixture; binary mixtures; contaminants; gases; humidity; low-ppm range; measuring cavity; nitrogen-sulfur hexafluoride mixture; nitrogen-water mixture; reference cavity; resonant frequency; resonant-cavity based microwave differential technique; Cavity resonators; Gases; Humidity measurement; Microwave measurements; Microwave theory and techniques; Permittivity measurement; Pollution measurement; Resonance; Resonant frequency; Sulfur hexafluoride;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1999 Annual Report Conference on
Conference_Location :
Austin, TX
Print_ISBN :
0-7803-5414-1
DOI :
10.1109/CEIDP.1999.804675
