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US Patent 9574995 CO2 concentration sensor

Patent 9574995 was granted and assigned to Withings on February, 2017 by the United States Patent and Trademark Office.

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Patent abstractTimelineTable: Further ResourcesReferences
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Patent
Patent

Patent attributes

Patent Applicant
Withings
Withings
Current Assignee
Withings
Withings
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
9574995
Patent Inventor Names
David Campo1
Xavier Debreuil1
Pierre Barrochin1
Brice Brac de la Perriere1
Cédric Hutchings1
Nadine Buard1
Date of Patent
February 21, 2017
Patent Application Number
14759008
Date Filed
December 30, 2013
Patent Primary Examiner
‌
Hoa Pham
Patent abstract

Device for measuring the concentration of a predetermined gas, in particular CO2, comprising a cavity, a light source emitting light rays within a basic spectral range including visible and infrared, a detector configured to receive a portion of the light rays within a first predefined spectral range corresponding to high absorption of the predetermined gas, a photodiode configured to receive a portion of the light rays within a second predefined spectral range corresponding to low absorption of the predetermined gas, a control unit configured to calculate the concentration of the predetermined gas by comparing the radiant power received by the detector to the radiant power received by the photodiode.

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