jdjeff58
New member
Matthias...
I am curious about Version 4.0.0.3 conductivity page. I wasn't aware until now that we could display our salinity in units of SG. However, what I am seeing during the profilux conversion of my 'Current Value' is a little bit confusing.
My current value in mS is 52. When I select the option to view in 'Salinity (PSU)' units, it reads 33.8. I'm assuming that is in PPT. Also, if I select to view my units as 'Density (kg/l)', the result is 1.0228. Normal Joe Schmoe like myself would expect to see something like ~1.025.
I have attempted to search for a conversion from SG units that are normally read from a USA made refractometer. I couldn't find anything that converted from whatever those units are (they are never really identified although I've seen gm/cm3 on some tables). The 'PSU' value is also off compared to the numbers I've been seeing. I would expect to see something between 34 and 35 PPT.
I realize that I could be missing something with the units conversion if there is one. But could you please explain what these differences are?
I've pasted this table below from a Randy Holmes Farley article on reef salinity. Tables identical to this circulate around the USA reef community. I know this is a complex subject and what I'd hate to see is that some people may not understand that the SG units in the Profilux control program (for whatever reason) may not be quite what they are expecting. Could you please clarify this?
I am curious about Version 4.0.0.3 conductivity page. I wasn't aware until now that we could display our salinity in units of SG. However, what I am seeing during the profilux conversion of my 'Current Value' is a little bit confusing.
My current value in mS is 52. When I select the option to view in 'Salinity (PSU)' units, it reads 33.8. I'm assuming that is in PPT. Also, if I select to view my units as 'Density (kg/l)', the result is 1.0228. Normal Joe Schmoe like myself would expect to see something like ~1.025.
I have attempted to search for a conversion from SG units that are normally read from a USA made refractometer. I couldn't find anything that converted from whatever those units are (they are never really identified although I've seen gm/cm3 on some tables). The 'PSU' value is also off compared to the numbers I've been seeing. I would expect to see something between 34 and 35 PPT.
I realize that I could be missing something with the units conversion if there is one. But could you please explain what these differences are?
I've pasted this table below from a Randy Holmes Farley article on reef salinity. Tables identical to this circulate around the USA reef community. I know this is a complex subject and what I'd hate to see is that some people may not understand that the SG units in the Profilux control program (for whatever reason) may not be quite what they are expecting. Could you please clarify this?
