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Thread: Conductivity probe reading floating down

  1. #1
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    Conductivity probe reading floating down

    My new conductivity probe doesn't seem to be holding a reading. Looking at the attached graph you can see where I re-calibrated the probe. It seems to gradually float down for about 10-12 hours then stabilize. Just now I put the probe back in the calibration fluid and it read 34.5. A tiny bit low but it was close. Put the probe back in the tank at in read 32.5. This is a new probe and the graph shows the life of the probe. Any ideas from the brainiacs here?

    Screen Shot 2018-01-06 at 10.06.15 AM.jpg

  2. #2
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    Figured out the variability of the probe was due to my skimmer pump. I only figured this out because I turned off my skimmer to do a byropsis treatment. Guess I'll be moving my conductivity probe to the main tank.

  3. #3
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    Could be temp too. If the cond reads 34.5 in room temp calibration fluid it isn't calibrated correctly. It should however read 35.0 in calibrated fluid that matches tank temp if everything is dead on.

    You might be an engineer if...You have no life and can prove it mathematically.

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