Ivan,
I have the Hanna PWT. If I have a reading of 10.0 on the meter this means
the solution is about 5.5 PPM. Is this correct ?
K. Watson
----- Original Message -----
From: "Ivan Anderson" <[email protected]>
To: "Silver-List" <[email protected]>
Sent: Thursday, April 13, 2000 12:55 AM
Subject: CS>Hanna meter
> Well there you go,
> (Are you there ole Bob)
>
> It just shows you the unreliability of using conductivity as a measure
> of concentration (ppm) of colloids, unless they are used within strict
> parameters.
> Although, if Robert uses his PWT in the same manner every time, then
> the chances are that he will have good correlation between his reading
> and the actual concentration.
>
> The relationship between silver IONS (Ag+ as distinct from colloid
> particles) is
> 1.76 at 5ppm and 1.78 at 20ppm, so lets say 1.77. That is the uS
> reading times 1.77 is the concentration in mg/L (ppm). 1.77ppm / uS or
> 0.57uS / ppm.
> In full... 0.57 uS cm^2 / mg.
>
> So 5ppm will read 2.8uS
> 10ppm will read 5.7uS
> 15ppm will read 8.5uS
> 20ppm will read 11.3uS
>
> The above is true for a silver colloid that is made with some regard
> to current limiting (density) and minimal sludge inclusion, AT THE
> TIME THE POWER IS WITHDRAWN FROM THE ELECTRODES.
>
> Many will find that the conductivity or ppm reading will rise as time
> passes, even to a point where the reading is double the actual silver
> concentration.
> The uS reading of well made CS seems to rise until the ppm equals the
> uS reading and remains stable at this point.
>
> The rate and the amount this occurs can be some indication of the
> quality of the colloid, that is, the amount of uncharged particle
> inclusion, and the amount and rate of flocculation or particle
> aggregation.
>
> Ivan,
>
> ----- Original Message -----
> From: "Robert Dohr" <[email protected]>
> To: <[email protected]>
> Sent: Thursday, 13 April 2000 10:35
> Subject: Re: CS> Hanna Meter
>
>
> > Greetings Seekers;
> > Regarding Hanna Meters TDS & PWT. I have the PWT #98308. I know Ken
> (Coyote)
> > has the TDS1. We have been comparing notes on batches made using the
> same CZen
> > generators. As for me I spoke to the techs at Hanna. They said that
> with the
> > PWT which measure conductance in us/cm, to convert to PPM I should
> divide by
> > two. I made a sample batch of CS which measured 25.5 us/cm and sent
> it to the
> > lab at CSPro systems to have it tested by PhotoSpectrometry. The
> results came
> > back at 15 PPM. That would be 59% of the measured reading. This is
> how I now
> > measure all my batches. Ken can tell you what fudge factor he uses
> for his
> > TDS1. How about it Coyote?
> > NAMASTE'
> > Beldohr
>
>
>
>
>
>
>
> --
> 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]
> Silver-list archive: http://escribe.com/health/thesilverlist/index.html
> List maintainer: Mike Devour <[email protected]>
>
>
