Cheap O2 Sensors and reference air

[Shannen Durphey]

David A. Cooley wrote:
> 
> I don't think it travels down the wire... They use Hi temp, teflon
> insulated wire that "breathes" no better than any other wire.  

That is in direct contrast to GM service information.
Shannen

The outer
> shell of the O2 sensor is vented to the atmosphere.  AC sensors have a
> "floating" metal cap over the top of the sensor and the air is vented in
> between the bottom of the cap and the hex of the threaded part.
> The Bosch sensor I bought for my LeSabre has several holes around the top
> where the wire enters covered with a small round ceramic "pill" I assume is
> to keep water out..
> 
> At 01:20 AM 10/10/98 -0400, you wrote:
> >
> >> If the wires are properly crimped you will not loose the reference
> atmospheric
> >> air inside the wires.
> >
> >Ok, I'll bite. Could someone please explain to me how the reference air
> >for an O2 sensor is inside the wire or comes from the wire? I had kind
> >of figured there was an active layer (or layers), with thin conductive
> >film electrodes on each side, which still allowed O2 to pass through,
> >with the wires attached to the thin-film electrodes.
> >
> >Honestly I'm not trying to be difficult, or disagree with what anyone has
> >said about how these sensors work, I'm just trying to *understand* it.
> >
> >   TIA,
> >   Chris C.
> >
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>            David Cooley N5XMT           Internet: N5XMT at bellsouth.net
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