Acoustic wave (AW) based moisture sensor for use with corrosive gases
Abstract
Moisture corrosive gas stream is measured as a function of the difference in resonant frequencies between two acoustic wave (AW) devices, each with a film which accepts at least one of the components of the gas stream. One AW is located in the gas stream while the other is located outside the gas stream but in the same thermal environment. In one embodiment, the film is a hydrophilic material such as SiO{sub 2}. In another embodiment, the SiO{sub 2} is covered with another film which is impermeable to the corrosive gas, such that the AW device in the gas stream measures only the water vapor. In yet another embodiment, the film comprises polyethylene oxide which is hydrophobic and measures only the partial pressure of the corrosive gas. Other embodiments allow for compensation of drift in the system. 8 figs.
- Inventors:
- Issue Date:
- Research Org.:
- AT&T
- OSTI Identifier:
- 392630
- Patent Number(s):
- 5571944
- Application Number:
- PAN: 8-359,510
- Assignee:
- Sandia Corp., Albuquerque, NM (United States)
- DOE Contract Number:
- AC04-76DP00789
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 5 Nov 1996
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; GAS ANALYSIS; SONIC PROBES; DESIGN; SILICON OXIDES; POLYETHYLENE GLYCOLS; THIN FILMS; HYGROSCOPICITY; SOUND WAVES; OPERATION
Citation Formats
Pfeifer, K B, Frye, G C, and Schneider, T W. Acoustic wave (AW) based moisture sensor for use with corrosive gases. United States: N. p., 1996.
Web.
Pfeifer, K B, Frye, G C, & Schneider, T W. Acoustic wave (AW) based moisture sensor for use with corrosive gases. United States.
Pfeifer, K B, Frye, G C, and Schneider, T W. Tue .
"Acoustic wave (AW) based moisture sensor for use with corrosive gases". United States.
@article{osti_392630,
title = {Acoustic wave (AW) based moisture sensor for use with corrosive gases},
author = {Pfeifer, K B and Frye, G C and Schneider, T W},
abstractNote = {Moisture corrosive gas stream is measured as a function of the difference in resonant frequencies between two acoustic wave (AW) devices, each with a film which accepts at least one of the components of the gas stream. One AW is located in the gas stream while the other is located outside the gas stream but in the same thermal environment. In one embodiment, the film is a hydrophilic material such as SiO{sub 2}. In another embodiment, the SiO{sub 2} is covered with another film which is impermeable to the corrosive gas, such that the AW device in the gas stream measures only the water vapor. In yet another embodiment, the film comprises polyethylene oxide which is hydrophobic and measures only the partial pressure of the corrosive gas. Other embodiments allow for compensation of drift in the system. 8 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 05 00:00:00 EST 1996},
month = {Tue Nov 05 00:00:00 EST 1996}
}