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Thread: Conductivity cards

  1. #1
    Join Date
    26.09.2011
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    Default Conductivity cards

    Hi, I am looking into an expension card, but I dont know If I need the PL-0002 or the PL-0004.
    I am confused about their reach, the 0004 can measure up to 100mS according your website, but isnt that a bit too low for fresh water? I am happy with a conductivity of around 200.
    Then 0002 does no more then 2mS?

    Robert

  2. #2
    Join Date
    23.08.2009
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    228

    Default

    002 is for fresh water, 004 is for saltwater. It's also in the naming of the card, the difference between CondF and CondS.


    Sent from my iPad using Tapatalk HD

  3. #3
    Join Date
    26.09.2011
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    Default

    Thanks for your reply
    That name difference makes sense, but still I am confused about the reach of that card only 2 mS? I must have my units wrong, but Isn't a value of 150-300 mS a more common value for fresh water?

  4. #4
    Join Date
    23.08.2009
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    Default

    Distilled Water: 0.5 to 3.0 mS
    Melted Snow: 2 to 42 mS
    Drinking Water: 30 to 1500 mS
    Freshwater Streams: 100 to 2000

  5. #5
    Join Date
    06.02.2012
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    You mix µS (Micro-Siemens) and mS (Milli-Siemens) -> 1mS = 1000µS, so a range of 2 mS means 2000µS which is good for fresh water.

  6. #6
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    26.09.2011
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    Default

    Günter, thanks!

  7. #7
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    26.09.2011
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    Default

    One more thing, i see that there are 2 different kind of sensors on the market, graphite and platinum. Do they both work in fresh water? What's the benefit of the expensive platinum one?

  8. #8
    Join Date
    06.02.2012
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    Do they both work in fresh water?
    Yes

    What's the benefit of the expensive platinum one?
    It´s working also in sea water - graphite does not [in fact, it also does, but not for a long time]

  9. #9
    Join Date
    26.09.2011
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    Default

    Ok understood, thanks again!

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