Yeah you use a TDS meter. I got mine on ebay.

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On Thu, Jun 20, 2019 at 11:05 PM Jean Baugh <[email protected]>
wrote:

> Hi,
>
> There is something interesting happening here.  I have two colloidal
> silver machines; one newer one cuts off automatically and you can cut it
> back on a few times before it refuses, but the old one is not cutting off.
> No idea how high the CS is but the laser beam shows a good beam through the
> newer machine colloidal silver and a HUGE beam through the old machine
> colloidal silver.  It is still crystal clear in color.  Does anyone know
> how to tell how high the CS is?
>
> Thank you,
>
> Jean
>
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