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Digital pH testers

Discussion in 'General Plant Topics' started by stcyrwm@adelphia.net, Jun 7, 2005.

  1. stcyrwm@adelphia.net

    stcyrwm@adelphia.net Prolific Poster

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    Anyone out there using a digital pH tester? Any recommendations of ones to get or avoid.

    Thanks, Bill
     
  2. happychem

    happychem Junior Poster

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    Re: Digital pH testers

    I've got the Heppa brand one from National Industrial Supplies. It reproduces indicator results and holds its calibration well, as long as it's rinsed with DI or otherwise 'clean' water (not tap).

    The best way to use them is to take a water sample out of the tank and test it away from electrical equiptment like lights which throw it off.
     
  3. Paul

    Paul Guru Class Expert

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    Re: Digital pH testers

    I bought a Hanna 98103 Checker 1 I dont use it now as it seems to need calibrating constantly and apparently is only accurate to 0.2 - couldnt see the advantage of it
     
  4. stcyrwm@adelphia.net

    stcyrwm@adelphia.net Prolific Poster

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    Re: Digital pH testers

    Would it work if you just shut the power off for a minute? Or do you have to do a sample regardless? It would nice to be able to just dip and get results.

    Thanks, Bill
     
  5. AV8TOR

    AV8TOR Junior Poster

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    Re: Digital pH testers

    I am using this pH 53 meter from Milwaukee and could not be happier. Took a little while to get down the calibration because the instructions I found vague but now it is a breeze. 0.02 +- accuracy.
     
  6. Bill

    Bill Lifetime Charter Member
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    Re: Digital pH testers

    I have the Hanna pHep5 and it works great, the accuracy is +-.01. It holds it's calibration well and you just rinse it in tap water and store in the 4.0 calib solution.

    http://www.drsfostersmith.com/Product/Prod_Display.cfm?pcatid=9848&inm=1&N=2004+113074+113565

    I've used more expensive ones at work and I can't say that they work any better. I would never switch back to a test kit, it's way to time consuming and a lot less accurate.

    If you end up buying one don't forget the calibration solution. I like the disposable ones in packets so you don't have to worry about them getting contaminated.

    Bill
     
  7. Tom Barr

    Tom Barr Founder
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    Re: Digital pH testers

    Anything that uses a decent probe will do well.

    Regards,
    Tom Barr
     
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