Chemistry: electrical and wave energy – Processes and products
Patent
1987-04-06
1989-10-24
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
204406, 204412, 204425, G01N 2758
Patent
active
048759813
ABSTRACT:
An oxygen analyzing method for determining a positive or negative oxygen concentration of a measurement gas which changes between oxidizing and reducing atmospheres. The method uses a sensing element having an oxygen sensing cell wherein an electromotive force is induced between its measuring and reference electrodes according to the principle of an oxygen concentration cell. The atmosphere adjacent to the measuring electrode is controlled by controlling a pumping current to be applied to an oxygen pumping cell such that the electromotive force induced in the sensing cell is maintained at a predetermined level. A heater is provided to heat the sensing and pumping cells, to maintain their operating temperature within a range of 700.degree.-960.degree. C. The pumping current, or a signal to control the pumping current, is converted into an oxygen concentration signal whose level is held within one of a positive range and a negative range. The concentration signal represents the positive oxygen concentration of the oxidizing atmosphere, or the negative oxygen concentration of the reducing atmosphere.
REFERENCES:
patent: 4272331 (1981-06-01), Hetrick
patent: 4396466 (1983-08-01), Hetrick et al.
patent: 4578171 (1986-03-01), Yamada et al.
patent: 4594139 (1986-06-01), Asayama et al.
patent: 4601809 (1986-07-01), Kitahara
patent: 4645572 (1987-02-01), Nishizawa et al.
patent: 4666566 (1987-05-01), Mizutani et al.
patent: 4707241 (1987-11-01), Nakagawa et al.
patent: 4770758 (1988-09-01), Suzuki et al.
patent: 4776943 (1988-10-01), Kitahara
Hattori Akinobu
Sasaki Yuichi
Usami Jun
Kaplan G. L.
NGK Insulators Ltd.
LandOfFree
Oxygen analyzing method and device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Oxygen analyzing method and device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oxygen analyzing method and device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1587227