Best Way To Measure Salinity? Hanna Marine Salinity Tester or Refractometer?

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JSkeleton

JSkeleton

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It also requires manual temperature correction. The result from unheated new saltt water will be way off.
But what about something like the Hanna one I mentioned? Will conductive meters like that be way off in unheated salt water as well or more accurate?

Also, same question but for those plastic hydrometers with the plastic needles?
 
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Randy Holmes-Farley

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Makes sense …
understanding most salt either is mined or collected from dried oceans . I assumed us was sodium chloride ( salt ) and was thinking what’s the difference ?
Why would it have to be specifically “Morton’s” table
Salt

The brand is just for volume measurements since the mass per volume changes a bit by brand.
 

Randy Holmes-Farley

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But what about something like the Hanna one I mentioned? Will conductive meters like that be way off in unheated salt water as well or more accurate?

Also, same question but for those plastic hydrometers with the plastic needles?

Conductivity meters like the Hanna automatically correct for temp changes, although that doesn’t mean they always do it perfectly.

Same for swing arm hydrometers. they correct by design.

Glass hydrometers cannot.
 
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Randy Holmes-Farley

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Randy, if you see this, tell me if I misinterpreted something.
***for making conductivity standard using a scale

Here's an excerpt from a previous post:

One puzzling thing to me is that, for EC (conductivity) standard, he notes 3.29% but that's salt to total (salt + water) so:
salt = 0.0329(salt + freshwater)

Seems easier to simplify and deal with:
salt = 0.034 x freshwater

...I meant all that from a practical stand-point (meaning as we're weighing out salt vs water to make a standard for EC)

Percent is always defined as a fraction of the total, that’s why I wrote it that way. Same for other units we use, such as ppt, ppm, ppb, etc.

You can calculate ratios of ingredients, certainly. :)
 

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Percent is always defined as a fraction of the total, that’s why I wrote it that way. Same for other units we use, such as ppt, ppm, ppb, etc.

You can calculate ratios of ingredients, certainly. :)
I get it.
I was more thinking for the person who just wants to "make" the standard (in practice), easier to follow "directions" don't fit (as easily) with what you just said.

Application of your standard is:
1. weigh the water
2. weigh the salt
3. mix

That's the only reason I was puzzled by reading your DIY standards.
Excellent information,,, but I felt like it fell short on the final, useable formula,,, for those that want to scale it (((probably upwards since the most likely failure will be the ability to accurately weigh the salt)))
 

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