Yes Mike, That looks like the one. 0 - 99.9uS = 0 - 100 ppm as silver. It turns out (as far as I can determine) that ppm as silver is almost equal to the reading in uS/cm^2 in water. I don't know why I haven't noticed this before!!!
My reasoning: 99.9 uS = 50 ppm CaCO3 in water, given : http://www.goodwaterco.com/tds.htm Equivalent weight of CaCO3 = 50 (molecular weight / valencies, Ca+ 40.08 plus CO3- 60.01 = 100.09 divided by sum of valencies 2) , Equivalent weight of Na+ = 22.99 Conversion factor ppm as Na x 2.17 = ppm as CaCo3 given as above. Eqw Na 22.99 x 2.17 = 49.88 Eqw CaCO3 Eqw of Ag+ = 107.87 conversion factor ppm as Ag+ x 0.46 = ppm as CaCO3. (107.87 x .46 = 49.6) In other words a TDS meter reading in ppm as CaCO3 (TDS factor 0.5) doubled gives readout in ppm Ag+ (as I have noted before). What I hadn't noticed is that this is equal to the conductivity reading. Some confirmation is required I guess, but I am confident that this <light bulb burns brightly in thought bubble> will save me some work :-) Cheers - Ivan. ----- Original Message ----- From: M. G. Devour <[email protected]> To: <[email protected]> Sent: Monday, 27 September 1999 12:09 Subject: Re: CS>Standardization - A Call for Standards! > > > > The Conmet 1 (HI 98305) would be the unit of choice at $142.00 > > http://www.hannainst.com/products/testers/conmet.htm > > But more likely the DiST 3 at the miserly sum of $46.70 > > http://www.hannainst.com/products/testers/distw.htm > > > > Ivan!! > > Check out the Hanna PWT (Pure Water Tester) and see what you think > compared to the above? > > http://www.hannainst.com/products/testers/pwt.htm > > I thought it was pretty cheap and the range was set almost perfectly > for our needs. > > Let me know. This is the one I've been planning to get when I > upgrade. > > Mike D. > [Mike Devour, Citizen, Patriot, Libertarian] > [[email protected] ] > [Speaking only for myself... ] > -- 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]>
