Hanna also make TDS meters that read out in PPM.
They all work the same way and none of them directly measure PPM.
If any two identical meters read the same over their entire range, you got lucky.
They're only good for getting a ballpark number.
A ballpark number is plenty good enough.
Taste buds and a laser pen are a lot cheaper...but don't give nebulous numbers.
Ode
At 11:26 AM 5/9/2005 EDT, you wrote:
>>>>
In a message dated 5/9/05 8:49:55 AM Central Daylight Time, odecoy...@alltel.net writes:<<<<
Essentialy, double a PPM/TDS meter reading to get conductivity [uS]
uS = PPM ..in CS/EIS..after conductivity stabilizes.
Ode -- please -- are you referring to a Hanna tester here? MA
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