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US3607701A
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Electrochemical analyzer for measuring the oxygen content of hot gases
Assignee: Danks Holding Ltd
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Filing: 1968-01-05
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Granted: 1971-09-21
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Expires: 1988-01-05
Abstract
Abstract An analyzer for determining the oxygen content of a hot gas employing an electrochemical cell having one electrode disposed in the gas, the oxygen content of which it is desired to determine and the other electrode disposed in a reference gas of known oxygen content. The effect of temperature variations on the cell output is eliminated so that the cell may be operated in a varying temperature environment thus making it particularly adaptable for in situ applications.
Inventors
- 👤 Peter J Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:23
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/4065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
An analyzer for determining percent oxygen as set forth in claim 1, wherein said means for adjusting the pressure includes a pressure regulator adjustable to maintain a constant pressure in the reference gas indicative of desired oxygen level in the sampled gas.
Claim 2
Dependent Claim
137 words
An analyzer for determining the oxygen content in a flowing gas of variable temperature, comprising in combination, a solid electrolyte cell disposed in said flowing gas producing an EMF varying both in accordance with said oxygen content and the temperature of the flowing gas, an amplifier responsive to said EMF generating an output voltage proportional to said EMF, an electric circuit including a first resistor and a second resistor connected in series across said output voltage, said first resistor disposed in said gas stream adjacent to said cell having a positive temperature coefficient such that its resistance is substantially proportional to the temperature of said gas and said second resistor having a substantially zero temperature coefficient and means for measuring the voltage across said second resistor as an indication of the oxygen content in said flowing gas.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |