Differences and Calibration Issues with Innowater pH Probes: A Technical Consultation

Client:
Hello, what is the difference between the two pH probes from Innowater? Thank you

Technical Advisor:
Hello, they are the same, but one has a screw system.

Client:
Ok, I can no longer calibrate the probe, I can't get below 5.8 with pH 4 solution, is the probe broken?

Technical Advisor:
Yes

Client:
Ok, so which one do I need for my pH and RX?

Client:
So I understand, I can just transfer the screw from my old one to the new one.

Technical Advisor:
Yes

Client:
Perfect, thank you

Technical Advisor:
You're welcome