Measuring CO

[Bruce Plecan]

Heathkit sold a DIY AFR meter that used a whetstone bridge, and one leg of
it was the sensor.  That was like in the early 80's.  Sensor was
discontinued years ago, and I was never able to track one down to see what
it really was.
  Personally, that technology is so old, I wouldn't bother with it.
Trouble is all the newer stuff is soo expensive.
Between a rock, and a hard place
Grumpy

> My questions: Does anyone know this method? How does it work, and
> how good is it? Here in Germany, testers to do emissions tests with have
> to use infrared absorbing measurement, so I wonder about the accuracy
> of other methods. Can anybody tell me if building a CO tester working
> according to the method mentioned above is worth the money and time?


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