Refractometers [RE-wrenches]

[Carl Hansen]

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Thanks for the info on these refractometers, I'm wondering  if this Misco 
brand is capable of measuring the acidity of Propylene and Ethylene glycol 
in addition to temp. info?
  For me its the acidity that has been the most difficult to determine. As 
those test strips for pool acidity don't seem to work with glycol.
What have other Solar Heating Wrenches been using to test glycol acidity?

  Thanks,
                   Carl Hansen
                  Hansen&Sun Elect. 


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