- May 23, 2015
- 24,443
- Pool Size
- 16000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Interesting. I checked the salinity again today and both the swg and manual test are now the same. 3600 ppm. Does salinity fluctuate on a daily basis?
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No. Actual salinity does not fluctuate unless you remove large quantities of water. The SWG cell is basically a glorified electrical conductivity meter. Pentair's cell does a fairly poor job of temperature compensation even when the temperature sensor is working. It also only reads salinity once at start up and then once every 12 hours of operating time. The results will vary a little with temperature. This is why it is important to have a K-1766 test kit so you can know the true salt levels and then diagnose problems from there. The SWG salinity output should be considered ballpark at best (+/-500ppm).