Hanna Alk Colorimeter Checker

Discussion in 'Reef Chemistry' started by MolaMola, Sep 12, 2017.

  1. MolaMola

    MolaMola Supporting Member

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    On the advice that it would "change my life" I got a Hanna Alk Checker. Yes, it is awesome, but I am not convinced it is accurate and there is no way to calibrate it. Does anyone have one that measures in dKH that they could bring to the swap Saturday so we could compare readings?
     
  2. Bruce Spiegelman

    Bruce Spiegelman BOD

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    Yep. I have one of each, but I'll bring the DKH one.
     
  3. RandyC

    RandyC Supporting Member

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    They do have standard solution samples you can check against.

    For HI772 (DKH)
    https://www.bulkreefsupply.com/hi772-11-alkalinity-dkh-calibration-check-set.html

    For HI755 (ppm)
    https://www.bulkreefsupply.com/hi75...rds-for-hi755-hanna-checker-marine-water.html
     
  4. MolaMola

    MolaMola Supporting Member

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    Thanks to both of you. Bruce - I would love to compare.
    RandyC - I did not know that. I found a bottle of BAR Alk standard sol'n and my reading did not match, but I think the bottle was old and possibly contaminated (by my classroom, not BAR).
     
  5. L/B Block

    L/B Block Supporting Member

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    DEATH BY SNU SNU likes this.
  6. RandyC

    RandyC Supporting Member

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    Buy a new one? Or just know you're off by X amount.

    AFAIK, no way to calibrate them.
     
  7. Bruce Spiegelman

    Bruce Spiegelman BOD

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    She's a teacher -- she can math.
     
  8. roostertech

    roostertech reef noob

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    yeah you should check it against a titration based kit once in awhile to make sure it is on point. Mine came within 0.1. I think Hanna will send you a new one if yours is way off.
     
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  9. L/B Block

    L/B Block Supporting Member

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    Maybe we can get them to put the reagent in a plastic tub with a tiny spoon too vs trying to open those packets.

    Of course Neptune will have that new gizmo out too to measure alk, calc, and mag.


    Sent from my iPhone using Tapatalk
     
  10. Flagg37

    Flagg37 Colorado member

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    The alk reagent is a liquid in a bottle.

    There will also be a variation from one bottle of reagent to the next. So even if you find out it's delta it will change once you finish that bottle and move on to the next one. I think it's accurate enough for my liking.
     
  11. Vhuang168

    Vhuang168 Supporting Member

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    This is why I test against a standard when I open a new bottle of reagent. Gives me a delta.
     
  12. L/B Block

    L/B Block Supporting Member

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    I got my Hanna reagents all mixed up-I was thinking phosphate.


    Sent from my iPhone using Tapatalk
     
  13. scuzy

    scuzy Supporting Member

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    Heard the phosphate reference isn't that great.
     
  14. yellojello

    yellojello Supporting Member

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    I have a calibration checkset if you want to use, although I won't be able to make it to the swap. I'm in San Jose / Santa Clara.
     
  15. yellojello

    yellojello Supporting Member

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    Maybe if someone going to the swap wants to pick up from me, can have it at the swap for members to bring their hanna alks to check with it.
     

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