Refractometer Errors

[andsoitgoes]

This came up when I was having issues with my digital salinity meter. It's very frustrating and very difficult to find something that will actually match up.

With the long-term success people have had using refractometers, hydrometers (both floating and swing arm) - in the end, I think keeping it consistent is more important than anything.

So I think making a standard, and keeping that as accurate as possible to base your test against is the easiest solution, but looking at the 5-page document - it just makes me go back to thinking if keeping things consistent is more important than a minor difference which might still be in existence unless you're doing this regularly?