$175 CO meter?

[bjanesi at juno.com]

"Rich M" <rsrich at cwcom.net>  wrote...
>in a green box  it sounds like it may be made by 'Gunsons'. If it is the
> unit I'm thinking of, your conclusion is correct - best left in the
shop -
> we had one here at work for evaluation (albeit a bit unfairly comparing
it
> to an infra-red absorption meter) and it wasn't much use.
> However I may be completely wrong and thinking of a different 
> unit.......

The Gunson is the only one I have ever seen (okay, they make two models -
one with a digital gauge, the other a sweep hand).  I went so far as to
buy one of these (the digital one), only to return shortly after
purchase.  IMO, it is for very crude measurements - mine swung wildly
around a range of negative (?) PPM to over a hundred PPM on a car that
was in a very clean state of tune.

I suspect the $35 home CO meter may actually be more accurate, and I'd be
interested to hear of your success (or failure) in using it for exhaust
CO measurement.

Brad
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