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Hannah tester by cromero ..... Colloidal Silver Forum

Date:   2/18/2006 3:39:24 PM ( 16 years ago ago)
Hits:   1,779

I just recieved a hannah tester from Ebay today. I tested my supposed 10 ppm silver solution, and it read 4 ppm. Is this because it is not calibrated or should it already be calibrated. It's Saturday so I can't get a hold of the company. Any help thanks

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