Several variations to uS/PPM conversions but that's near enough for me without 
laboratory analysis.  That's all I do, just halve it, and it's close enough 
when comparing the 3 meters I use.  In the scheme of things with home produced 
EIS what's a ppm or three anyway?
N.

> From: [email protected]
> Date: Thu, 12 Jan 2012 09:47:51 +0000
> To: [email protected]
> Subject: CS>PPM vs uS
> 
> Hi,
> 
> I have been doing some more reading which has got me looking for a 
> resolution, namely what uS do you consider to roughly figure out the PPM.
> I know the reason why a typical ppm or uS meter would not give a reading due 
> to the ions which we do want to measure not being very measurable in terms in 
> electrical conductance.
> But it there a rough method to measure from the stuff that does conduct.
> What I am therefore asking is if my uS meter says 10 uS what ppm of CS should 
> I consider that to be.
> I have so far been halving the value so  that I would have said that was 5 
> ppm. This was from information I received from other posts.
> Kindly help shed some light in this matter for me.
> Cheers
> Peace to all
> Asif.
> 
> 
> 
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