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Hi Randy - I am going a bit nuts with this and am sorry to drag you back into this (well kind of ). I know this is not chem or your exact field. We can remove the thread and take to DM if needed.
Put simply, I don't like uncertainty, even when it doesn't matter. Kind of an OCD data thing with me. I was building a new calculator for TM temperature conversion and the chart built by Johan Thelander is making me twitch, as I don't know how he built it or verified it. The BRS chart as well. They don't match each other. BRS is more linear than Johan's and appears to be nabbed from some other hydrometer (my guess).
I do know that neither follow the standard/accepted formulas for seawater (UNESCO, PSS-78, Equations of State, etc.) that Simon Huntington, Hamza, me and several other people have built seawater calculators around.
I understand that due to the TM Hydrometer being hand made, that each will have slightly different nonlinearities with regard to density at temperature. So there is that too..
Seeing that you wrote the Reefkeeping.com article so long ago, I was wonder if you are willing to revisit or recall any of the information form Johan, Boomer, etc. regarding this topic. All of the suspects are long MIA in this space.
Just trying to scratch a long time itch here, but understand if you prefer not to participate.
Put simply, I don't like uncertainty, even when it doesn't matter. Kind of an OCD data thing with me. I was building a new calculator for TM temperature conversion and the chart built by Johan Thelander is making me twitch, as I don't know how he built it or verified it. The BRS chart as well. They don't match each other. BRS is more linear than Johan's and appears to be nabbed from some other hydrometer (my guess).
I do know that neither follow the standard/accepted formulas for seawater (UNESCO, PSS-78, Equations of State, etc.) that Simon Huntington, Hamza, me and several other people have built seawater calculators around.
I understand that due to the TM Hydrometer being hand made, that each will have slightly different nonlinearities with regard to density at temperature. So there is that too..
Seeing that you wrote the Reefkeeping.com article so long ago, I was wonder if you are willing to revisit or recall any of the information form Johan, Boomer, etc. regarding this topic. All of the suspects are long MIA in this space.
Just trying to scratch a long time itch here, but understand if you prefer not to participate.