Title of article
Differential, LED-excited, resonant NO2 photoacoustic system
Author/Authors
Bernhardt، نويسنده , , René and Santiago، نويسنده , , Guillermo D. and Slezak، نويسنده , , Verَnica B. and Peuriot، نويسنده , , Alejandro and Gonzلlez، نويسنده , , Martيn G.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2010
Pages
4
From page
513
To page
516
Abstract
We introduce the application of a differential microphone in an LED-excited photoacoustic system devoted to NO2 measurement. The microphone ports pick up out-of-phase signals generated in two resonators, thus achieving a larger electrical signal and good common mode noise rejection. The reduced noise floor and LEDs with higher optical power, made it possible to measure NO2 down to 60 ppbV, a figure that enables quantifying the amount of such a gas produced by gasoline engines equipped with catalytic converter.
Keywords
photoacoustic , Light-emitting-diode , Differential microphone , NO2
Journal title
Sensors and Actuators B: Chemical
Serial Year
2010
Journal title
Sensors and Actuators B: Chemical
Record number
1438523
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