Oxygen Sensor for 5KTQ

[LL - NY]

As I recall, the exhaust side of the sensor is coated with a metallic
coating of some kind and is sealed against such leakage. It is the 
reaction between the oxygen in the exhaust at the coating vs the
oxygen of fresh air on the other side that causes a reference differential
voltage that can be read. In effect, it's like the dielectric effect, only in
a different medium (the ceramic vs. a saline solution).

Robert, do I have this right?

LL - NY

On 5/7/05, harchris <harchris at smokesignal.net> wrote:
> On the fresh Oxygen supply to the inside of a sensor, since the gases inside
> the exhaust manifold are under pressure, and in some cases extremely hot,
> wouldn't this tend to push hot gases out any holes in the O2 sensors? If the
> gases are going out, how would fresh air get in? and wouldn't the hot gases
> going out tend to melt the insulation around the wires?
> 
> Enquiring minds need to know.
> 
> Cheers
> George
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