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  1. #1
    Join Date
    Nov 2006
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    Desert Southwest
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    What do you use to monitor pH and Conductivity?

    At a customers request I need to monitor a closed loop system, 4" chilled water line.
    I am thinking sensors with a 4-20 or 0-10 signal into a BACnet controller input.
    Kele has one of each but I'm not too concerned about pH but having a challenge finding conductivity.
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  2. #2
    Join Date
    Mar 2005
    Location
    Pacific Time Zone
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    4,361
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    Walchem
    http://www.walchem.com/Products/Cont...ontrollers.htm

    We've used the WD400, been good overall, used a 4-20mA for conductivity. They are now replaced with a newer model, which I haven't had much experience with but we do have at least one. WD660/400

    http://www.walchem.com/Products/Cont...ontrollers.htm
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