Hi @Blackburn,
Not at this stage, no.
This thread is the most relevant discussion, and looking at the manufacturers called out in the first post it seems the ANB sensors are expected to have a salinity output but it’s currently “coming soon” (and just provides 0.0 value readings for now), whereas Atlas Scientific has a conductivity sensor that does already include a salinity output.
Neither option currently has a BlueOS extension available, so integrating them will require some programming at this stage, rather than being completely plug-and-play.