An NOx detector.

Electro-chemical cell analyzer.The sample of the stack is taken, it passes through the hot tube , where the tempt is raised as high as 1200 to 1400deg cel,at high tempt it turns to its atomic form, which is measured by the cell.

Electro Chemical Cell Analyzer Thing.

A nitrogen oxide sensor: http://www.patentstorm.us/patents/6770181-claims.html http://www.freepatentsonline.com/6306271.html "To solve the mystery, Cohen and his laboratory colleagues spent about four years developing a detector that could simultaneously measure all the different NO compounds in air. What he came up with is a device that flash heats an air sample at the tip of an inlet to convert NO-compounds to nitrogen dioxide (NO2), and then measures the amount of NO2 by hitting the sample with a tunable dye laser and measuring the amount of fluorescence. By flash heating the air at different temperatures, he takes advantage of the fact that different NO compounds decompose to NO2 at different temperatures. He thus is able to measure separately the levels of nitric acid, peroxynitrates, and the sum of all alkyl and hydroxyalkyl nitrates. The technique, which Cohen refers to as thermal dissociation-laser induced fluorescence (TD-LIF), can monitor NO compounds continuously with sensitivity down to 30 parts per trillion. This is 1000 times more sensitive than needed for today's pollution monitoring." Source and further information: http://chemistry.berkeley.edu/Publications/newsletter/2002/april2002/no_cohen.htm http://www.universityofcalifornia.edu/news/article/4122 http://www.berkeley.edu/news/media/releases/2002/03/22_nitro.html Further information: http://lasp.colorado.edu/snoe/mission_overview/science_objectives.html