P4 conductivity probe read less every day..

i have a similar issue with the conductivity probe, jumping around by a significant amount. Yes, it may be the effects of micro bubbles, but if that is the case, why is my old P3 probe which is inches away not having the same issue, I got a replacement temperature probe because the old one was reading significantly higher than the P3 probe and a lab grade thermometer but i still have the same issue with the salinity probe. I've calibrated it a number of times now.(if you are wondering why i have both P3 and P4 in same tank it is because the P3 is connected to my old doser and Ive been waiting months now for a doser 2.1)

Print me one!

Attachment 9234

I have change the position and have upload it to the aquarium directly as you can see at the image, but after 3 hours it is still on the same values (1.0218)

more ideas?

My old P3 conductivity, connected to my P3, stays constant but the new P4 probe readings fluctuate , but if I take the new P4 one out and put it back in the water it is ok. Therefore I think it is, as others have said, due to micro-bubbles . I wonder if new sensors tend to attract these more than old ones. Old and new probes were close together in my sump.
Ps don't shake the probe when you take it out as I just did, catching the corner of the sump and smashing the glass probe! A very expensive shake!!
I guess this gives me a chance to plug the old P3 probe into the new P4 and see if it fluctuates whilst I order a new conductivity probe.:(

My probe is the Same. Everyday less reading. Take it out en put it in the water and it's oké

Verstuurd vanaf mijn SM-G900F met Tapatalk

Just refreshing this issue. It's still very real and apparent. Any solutions to this besides buying a $100 cell with hopes that it will solve it?Attachment 9265

I'm not sure if this helps or not but I have the conductivity probe on a freshwater tank and I am not experiencing this issue.

I have the same problem with P4. The probe read less every day. I don't have micro bubbles and I have calibrated it three times. It starts 1025 and two days later 1024 I need to recalibrate it. Any solution?

But is the salinity value on your profilux is correct?
To me from other values that do not correspond to density
Example refractometer 1.026 ---- probe 1.054

because ?

Yes the value on my profilux is correct 1025. But it read less every day :

Sunday: 1025
Monday:1024.5
Tuesday: 1024
Wednesday: 1023.5

I Need to recalibrate it every two days.... no bubbles, no dirty.. do I need to remplace it? I received the P4 five days ago...
I hope GHL can solve it. It's a general problem