The probes are cheap, it is the meter that is expensive. Go here for a look :-)

www.coleparmer.com

Type in Conductivity in the search window. The click on Conductivity , then Portable
Meters

--
Boomer

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"Pszemol" wrote in message ...
: "Boomer" wrote in message
...
: They are rarely off that much. What that means is that they guaranteed no more than
that.
: Even a $250 NIST certified hydrometer is + / - .001. Even the $ 600 fiberoptic
: refract , for SEAWATER is only +/- 1 ppt. If you want to get accurate you need a
: conductivity meter starting a + $400 to get it to 0.1 ppt.
:
: I am surprised with the amount of money this kind of ohm-meter costs...
: Is the electrode so expensive? The meter itself should be dirt cheap.
:
: If you use our stds. you will know exactly where you are at, with the refract and
: Deep-Six
:
: Good idea.