In a message dated 5/10/05 4:10:24 AM Central Daylight Time, 
odecoy...@alltel.net writes:


> A Hanna PWT reads out in microseimens of conductivity. [uS]
> 
> Hanna also make TDS meters that read out in PPM.

So -- to reiterate -- a Hanna PWT tester should be taken at face value -- no 
multiplying or dividing the numbers on the digital readout.  A TDS meter would 
require multiplying the numbers shown.  Have I got that right?    MA