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

fYear

1999

fDate

1999

Firstpage

411

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1999 Annual Report Conference on

Conference_Location

Austin, TX

Print_ISBN

0-7803-5414-1

Type

conf

DOI

10.1109/CEIDP.1999.804675

Filename

804675