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Thread: Testing... Sensors for computer?

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    Lershac's Avatar
    Join Date
    May 2007
    Baton Rouge, LA

    Testing... Sensors for computer?

    Does anyone know of sensors for the different levels to be measured that can be installed at the equipment pad so I can hook them up to a computer system for long term tracking? I would like to track as many levels as I can.
    (DIY):16K Gal 20X30 rectangular IG Gunite, w/spa, CCP 520 filter,2 Pentair VS pumps, 400KBTU Pentair gas heater, Heat Pump for cooling, **update5.25.2013** added an intellichem with acid pump that will control existing SWG. My Build Thread Here

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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Testing... Sensors for computer?

    Continuous electronic testing of the different chemical levels is problematic. FC, PH and temperature testing are the only ones you can get that actual work reliably. However, FC testing is $2,500+, and most people aren't willing to spend that much. PH testing also has some quirks, and really requires the more expensive test probes, around $200+, to be reliable. Temperature measurement is easy by comparison.
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    Join Date
    Mar 2008
    Los Angeles, Ca

    Re: Testing... Sensors for computer?

    Last year I was looking at using an Orb sensor to measure chlorine. This is suppoed to measure sanitizer in the water, which would correlate to free Cl, but it would not be an exact measure of free CL.

    I don't have a couple K for a free CL probe.

    I decided to just stay with the manual method, but it seems like it could be done.

    But, one thing I found out while I was looking into these things is that they are like special batteries, but their voltage changes depending on the ph or sanitizer levels in the water. That means, like batteries, they have a limited life, I think a year or two.

    Gets pretty expensive when you factor that in.

    To do this, you would need to install a sensor or two in the pipes of your system, connect the sensor to a buffer circuit, connect that to a A to D converter, connected to a PC somewhere.

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