mattseattle
Well-known member
Ok I have another question and it's regarding a post I found on reefcentral in the chemistry section. It states this:
-----
So, you want it to read 36 or 1.027, as this refract like 99.99 % of them DO NOT measure seawater, no matter what they say. These units are based on a NaCl / Sodium Chloride scale. This scale is not the same as a seawater scale, it is low by 1 unit, so you want it to read one unit higher, i.e. NSW is 35 ppt so you want it to read 36 ppt. If you are using the SG scale you want it to read 1.027, NOT 1.026, which is NSW.
-----
so this says that if my refractometer is reading 1.026 then the salinity of my water is actually 1.025?
is this a known 'fact' about refractometers that you have to add 1 unit to the reading?
-----
So, you want it to read 36 or 1.027, as this refract like 99.99 % of them DO NOT measure seawater, no matter what they say. These units are based on a NaCl / Sodium Chloride scale. This scale is not the same as a seawater scale, it is low by 1 unit, so you want it to read one unit higher, i.e. NSW is 35 ppt so you want it to read 36 ppt. If you are using the SG scale you want it to read 1.027, NOT 1.026, which is NSW.
-----
so this says that if my refractometer is reading 1.026 then the salinity of my water is actually 1.025?
is this a known 'fact' about refractometers that you have to add 1 unit to the reading?