General Electric Company

Edwards Systems Technology, Incorporated, Inc.

Amphenol Thermometrics, Inc.

Audrey Nelson

Andrian I Kouznetsov

Don Q Higgins

Brian C Maddux

Jean A Nisbet

A Resonant Cavity Light Emitting Diode (RCLED) device having a first active region having one or more quantum wells disposed within, a first chamber and a second chamber coupled to the first active region and a first reflector and a second reflector coupled to the first and second chambers respectively is disclosed. The RCLED can be optimized to emit radiation in the carbon-dioxide absorption band.

Mid-infrared resonant cavity light emitting diodes

A method for compensating for baseline or span drift in gas sensing equipment includes obtaining gas concentration data over a time period and identifying a quiescent period within that time period. The method compares a component concentration corresponding to the quiescent period with one or more additional component concentrations relating to different quiescent periods and calculates an estimated background gas concentration for a predetermined number of time periods. The estimated background concentration is then compared to a preset, or expected, background concentration, and a correction value is calculated. For baseline drift, a correction value is determined to be the difference between the estimated background concentration and the present (expected) background concentration. For span drift, a correction value is determined to be the ratio of the estimated background concentration to the preset (expect) background concentration. Measured concentrations by the gas sensor are then adjusted by the correction value.

Method of compensating for drift in gas sensing equipment

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Goleta, CA, United States of America

Audrey Nelson