PH Probe calibration & lifespan

[Lbrdsoxfan]

For my long time controller users (Apex, GHL, etc...), how long do you hold on to a PH Probe. Had to replace a probe on one of my systems yesterday (self inflicted) and decided to calibrate the new and old ph probe running on another system since I had to make the ph calibration fluid.

Noticed the new probe changed state quicker than the old. New probe is a Apera non double junction running on an A2 Apex and old is an Pinpoint double junction running on a Apex classic and dates back to 2020 or so.

End game how long is the life of a probe, do we just wait for it to get lazy and not change state, or is there a certain point you just swap them out. I usually change when they get lazy, btw.

Tia!!

 

[theatrus]

End game how long is the life of a probe, do we just wait for it to get lazy and not change state, or is there a certain point you just swap them out. I usually change when they get lazy, btw.

Really about a year in continuous immersion is really good. I've had some drift or become unusable after a month.

Single junction probes respond faster than a double junction.

 

[Lbrdsoxfan]

Really about a year in continuous immersion is really good. I've had some drift or become unusable after a month.

Single junction probes respond faster than a double junction.

Wow. I was waayyy off the mark for lifespan. The PH im not losing a ton of sleep over as they still calibrate. The ORP Probes on the other hand, probably need to replace those! Youngest is 3 years old this month. Trying to source quinhydrone in a not large amount has eluded me, so I can attempt calibration with Apex as I run ozone on one of the tanks.

 

[theatrus]

Wow. I was waayyy off the mark for lifespan. The PH im not losing a ton of sleep over as they still calibrate. The ORP Probes on the other hand, probably need to replace those! Youngest is 3 years old this month. Trying to source quinhydrone in a not large amount has eluded me, so I can attempt calibration with Apex as I run ozone on one of the tanks.

Some probes will just work. They're not really designed for it.

As for calibration fluid, I buy the larger bottles on Amazon. You don't need a lot of it as long as you have a small vessel to cover the business end of the probe, and clean off any residue and flush it.

 

[Pod_01]

So I just replaced my GHL pH probe after 6 years.
The new probe after calibration is reading exactly what the old probe showed.

I don’t use high pH liquid, just bicarbonate so that may explain the extended life span. I also clean them once a month with citric acid… quick dip and wipe clean.

I replaced it because my conductivity probe just gave up, after 6 years.

 

[besskurz]

I tried to calibrate mine but im having this issue, did you guys ever seen this?

 

[besskurz]

Edit: my situation was solved.

 

[Rshahnyc]

Edit: my situation was solved.

How? I’m getting that same message

 

[besskurz]

How? I’m getting that same message

I basically reconnected the probe.

try to disconnected the PH probe and check if you are really at ph1 or ph2 slot.

After that it went thru and completed the calibration.
Now it's working fine.