O2 sensor response times

[Orin]

> Ahh, this allows me to clear up a possible mistake I made a few posts
> ago when Mike "tah" M. asked about a "platinum O2 sensor". AFAIK, the
> platinum is just used to provide the metallic connection between the
> ZrO2 material and wiring to the sensor. It's probly vacuum-deposited
> onto the outsides of the layers of ZrO2 that make up a sensor, giving a
> metallic area that can be wired to. Don't quote me, I'm not a physical
> chemist; there might indeed be other electro-chemical reasons as well

Heywood pg 301:  "Equilibrium is established in the exhaust gases
by the catalytic activity of the platinum metal electrodes."

So yes, there are other reasons.

Orin.
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