Hi
Using a new salinity refractometer i get a consistent reading of 33, on the Apex 2016 probe it reads 28.4 (2 weeks old)
Now in my learning i have been in and out of the Apex like a yo yo learning and setting things swithcing on and off etc, is there a chance i need to recalibrate the probe or would you say the refractometer is way out although new.
thank you
Malc
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