Mercury balancing

[Rudi M. Machilek]

I use a Magnehelic differential pressure gauge for this purpose.  

http://www.dwyer-inst.com/htdocs/pressure/98-6p.html

More expensive than a manometer, but a bit more forgiving.  

/Rudi

> You can still get a mercury manometer from jc whitney or any 
> mail order 
> house, including mercury for 40 bucks.   Except now mercury 
> is 260 bucks a 
> pound, or 12.95 for a little vial, instead of nearly free.
> 

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