Hanna also makes the HI 93737. Which is advertised as specifically to 
measure silver.  The specs are a bit low for our purposes (0.0 to 0.6 mg/L) but 
the chemist should be able to tell you the conversion factor that is used and 
we 
could go from there.  If it is only a matter of measuring current and 
converting it 
to get an accurate reading then it would be a piece of cake to come up with a 
circuit to do this.

Regards,
George

On Fri, 10 Jul 98 16:38:17 -0400, robert.we...@ny.ubs.com wrote:

=>I called Hanna Instruments and spoke to their chemist to find out exactly
=>what the TDS-1 does and how it does it.  It was instructive.
=>
[snip]
=>
=>Bob Wells
=>
=>




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