Portal de Periódicos da CAPES

<title>Fiber optic NO<formula><inf><roman>2</roman></inf></formula> sensor for combustion control</title>

1994; SPIE; Volume: 2068; Linguagem: Inglês

10.1117/12.170662

1996-756X

Edward M. Schmidlin, Edgar A. Mendoza, Douglas J. Ferrell, Steven J. Syracuse, Albert N. Khalil, Robert A. Lieberman,

Spectroscopy and Laser Applications

We report here experimental results for a nitrogen dioxide sensor based on optical transmission through porous silica fiber. The NO 2 optrode is activated by using a proprietary chemical pretreatment process on the porous silica. Light is coupled to and from the porous silica optrode via 600 micrometers diameter optical fibers. The peak response of the sensor is at approximately 420 nm and therefore can be monitored using a blue LED. The sensor demonstrated a reversible, full-range response from 0 to 10,000 ppm NO 2 in a balance of nitrogen. The sensor also demonstrated a sensitivity of 10 ppm. The range and sensitivity of this sensor make it suitable for monitoring nitrogen dioxide emission from combustion stacks.