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javari said:hi,
I want to ask that can we measure liquid resistance meter like ohm meter..I mean that ohm meter and liquid conductivity meter has a same logic..or are they different things
can you help me thanks
the fact that the very act of measuring resistance puts current through the liquid you wish to measure.
For some reason they measure in Siemens, which is just the reciprocal of resistance. I never figured out why they do that as it's like the difference between saying 1 megahertz and saying the time constant is 1 micro second.
The unit of resistivity is ohm metres (or ohm cm, or ...), not ohms/cm.Leftyretro said:Same logic, however most will add a temperture element to the probe for compensation. I believe that normal units for resistivity in liquids is ohms/cm, at least that is a specification we have to test for when we are checking the deionized cooling water in a large variable speed drive system I support. The probe is just two wires spaced one cm apart and the we have to meet a spec of one megohm per cm or better. We use a omega conductivity meter that reads out in conductivity units or resistance units.
Here is the unit we use to measure out DI water resistivity:
**broken link removed**