Sharon- > >What does uS mean, please. So there is a Hanna meter than can in some way >(indirectly?) measure ppm? Or is this just another silvermaker's dream. >What does the meter cost?
One of the big brains can answer this better than me but here goes. . . The Hanna TDS meter that many people use measures ppm by sensing the conductivity in the solution. The range on this meter is 0 - 999 ppm. with quite a margin of error (10%?) Hanna also makes a PWT (Pure Water Tester) that also works on conductivity but it reads out in micro seimans (uS). which are basically x2 PPM when measuring water. so when I measure 12 uS on the PWT, I know its 6 ppm. (This according to the Hanna technician.) the reason I like the PWT is that its range is only 0 - 99 and it has a decimal point. so its a lot more accurate and gives you fractions of uS. the cost is not that much more than the TDS. I think I paid around 40 pounds for my PWT from Hanna, here in the UK best, Steve King -- The silver-list is a moderated forum for discussion of colloidal silver. To join or quit silver-list or silver-digest send an e-mail message to: [email protected] -or- [email protected] with the word subscribe or unsubscribe in the SUBJECT line. To post, address your message to: [email protected] List maintainer: Mike Devour <[email protected]>
