Gas concentration measuring apparatus designed to minimize...

Details Gas concentration measuring apparatus designed to minimize... Gas concentration measuring apparatus designed to minimize...

2005-06-07

2005-06-07

Larkin, Daniel S. (Department: 2856)

Measuring and testing

Gas analysis

Detector detail

C073S023310, C204S425000, C204S426000, C204S427000

Reexamination Certificate

active

06901785

ABSTRACT:
A gas concentration measuring apparatus has a gas sensor consisting of pump, sensor, and monitor cells. The apparatus works to determine the value of voltage applied to the pump cell when a change in current produced by the monitor cell or the sensor cell changes upon a change in the voltage applied to the pump cell varies greatly and uses it to determine a control point to which the voltage applied to the pump cell is to be controlled. This keeps a gas concentration measuring accuracy free from, for example, aging of the sensor.

REFERENCES:
patent: 5866799 (1999-02-01), Kato et al.
patent: 6295862 (2001-10-01), Kurokawa et al.
patent: 0798555 (1997-10-01), None
patent: 9-318596 (1997-12-01), None
patent: 2885336 (1999-02-01), None
patent: 2000-137018 (2000-05-01), None

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