I calibrated the conductivity sensor.
First time with 50 ms liquid
Second time with 53ms liquid ( it is 35 ppt of salinity )
The probe shows 33.8 ppt of salinity of water in my tank in both cases.
But optical refractometer shows 35 ppt in the my tank!
I calibrated optical refractometer with 35 ppt liquid
How to fix this problem?
How to I made calibration 35ppt liquid:
I took 965g of osmosis water. Plus 35 g of NaCl. Mixed it.
optical refractometer shows 35ppt solinity
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