Salinity/SG Hydrometer Corrected for Temperature

[ufans]

I have a Coralife Deep Six hydrometer and have a question about how to read it.

I understand that the temperature influences the actual measurement, but the Deep Six literature states that the hydrometer is already corrected for temperature. But, what temperature is it calibrated at. All of the conversion charts that I have seen are based on a hydrometer that is calibrated at 60deg F.

 

[tangir1]

I don't know but it is so imprecisice that even if you have a temperature it is corrected at from the manufacture, there is no use for it.

It is good for relative salinity check, however, but you just can't use the number with other hydrometer.