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On Fri, 24 Feb 1995, Bruce Bell wrote:

> >Andrew, O2 (Oxygen) sensor senses the amount of oxygen in your exhaust
> >gases....  
> 10 or so years ago I had a conversation with a Shell engineer about O2
> sensors. He claimed "O2" is a misnomer because they do not actually measure
> oxygen directly. Claim is some other by products of combustion are measured,
> cant remember which he said, perhaps hydrocarbons. Any one else know of
> this?  I don't want to create confusion, but I am curious.

- I cut (sawed) open the O2 sensor the last time I changed it to take
a look inside. Just found some ceramic material like the outside of
a sparkplug from what I remeber. Anyone care to explain how the hell
this device actually measures oxygen or whatever !! Just curious.