Apex 2016 Conductivity Probe fluctuation?

[Amz]

Is it normal for a 2016 Conductivity Probe to fluctuate so much throughout the day etc? Probe has been calibrated properly and I have used my D-d seawater refractometer to check against it.

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[Terence]

have you plotted that against temp?

[Amz]

have you plotted that against temp?

Hey Terence, just plotted it against temp. Pics below.. the temp and salt probes are in the return section of the sump, the heater is in the drain section. Not sure if this would make a difference? Heater comes on at 25.2 and off at 25.3.

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[Muttley000]

Mine looks the same way, it is because temperature effects specific gravity. Looks perfectly normal to me!