$175 CO meter?

Bruce Plecan nacelp at bright.net
Tue Mar 6 03:40:14 GMT 2001


Sounds like an update on the old Heathkit CO2 meter kit.
Sensor was just part of a whetstone bridge.
State of the art circa 1975
Bruce

From: <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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