David .... you mention about the lack of "straight" (I assume you mean pure or molecular) oxygen gas (or O2). You mention detecting oxygen in CO2 and NO2 ..... are you saying those oxygen "atoms" (not molecules) are involved with all of this in measuring the oxygen levels in engine exhaust? I know little of how this all works for exhaust analysis but the oxygen in NO2 and CO2 is not molecular oxygen anymore I don't think (just like the hydrogen in water (H2O) is not molecular hydrogen. I would be very surprised if those atoms were involved with the O2 measurement in exhaust gases. But correct me if I'm wrong or misreading what you said.
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Today's Featured Article - Good As New - by Bill Goodwin. In the summer of 1995, my father, Russ Goodwin, and I acquired the 1945 Farmall B that my grandfather used as an overseer on a farm in Waynesboro, Georgia. After my grandfather’s death in 1955, J.P. Rollins, son of the landowner, used the tractor. In the winter 1985, while in his possession the engine block cracked and was unrepairable. He had told my father
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