Noiseless gas concentration measurement apparatus

Chemistry: electrical and wave energy – Apparatus – Electrolytic

Reexamination Certificate

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Details

C204S425000, C204S426000, C205S781000, C073S023310

Reexamination Certificate

active

10647215

ABSTRACT:
A noiseless circuit structure of a gas concentration measuring apparatus is provided. The gas concentration measuring apparatus includes a control circuit and a gas sensor including a solid electrolyte body, a cell, and a heater serving to heat the solid electrolyte body up to an activation temperature. The control circuit is designed to cancel or remove electric noises arising from an on-off operation of the heater added to a sensor output.

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Japanese Search Report—Sep. 27, 2005.
Japanese Office Action dated Apr. 17, 2007.

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