Hi Catherine, Most of the Hanna TDS instruments have ranges of 0-999 PPM or 0-1999 with 2% accuracy of FULL scale. That means the unit can be off by as much as 20 or 40 PPM at the low OR high end of the range or at any reading. If you are trying to measure colloidal silver at the 5-15 PPM range, it is obvious that a 20 or 40 PPM possible error is not acceptable. The PWT will not be off more than 2 PPM so you can see how much more accurate it is. It is a conductance type meter; not a TDS (total dissolved solids) meter.
TDS meters usually read about half the actual value which further contributes to inaccuracy. Hope this helps you. Trem ----- Original Message ----- From: "C Creel" <[email protected]> To: <[email protected]> Sent: Sunday, April 13, 2003 3:07 PM Subject: Re: CS>hanna pwt > Dear Chuck, > > You said: > > <<Nope, you want the PWT. Consensus has eliminated the TDS long ago.>> > > Well, shoot. How inaccurate is it? > > Regards, > Catherine > > > -- > The silver-list is a moderated forum for discussion of colloidal silver. > > Instructions for unsubscribing may be found at: http://silverlist.org > > To post, address your message to: [email protected] > > Silver-list archive: http://escribe.com/health/thesilverlist/index.html > > List maintainer: Mike Devour <[email protected]> > > > >
