[Diy_efi] electronic nose

[Phil Hunter]

> Here's the correct link for ya: http://www.figarosensor.com/gaslist.html

Oops. Thanks.

> Any idea how well this would work in an automotive tuning application?

The article makes a point of it's circuit being qualitative rather than
quantitative, i.e., it could detect in your breath whether you've been
drinking, but not whether your blood alcohol was over the legal limit.

It also mentions the sensors are affected by temperature and humidity, and
the output is logarithmic, so you'd have quite a challenge calibrating
things, but it still might be quasi-useful in giving you a trending
indication, such as NOx reached a minimum and is now increasing again. 
The gasoline & diesel exhaust sensor is actually dual sensors in one package,
the diesel side sensitive to NOx.

rgds,
philh
(digest)

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