Choosing the Correct pH Probe for a Zodiac Tri Pro 18: Accurate Guide and Helpful Tips

Client:
Hello. Which pH probe for a Zodiac tri pro 18 - please be specific

Technical Advisor:
Hello. Send me a photo of your current probe, no need to dismantle it, I will check. There are 2 possible versions.

Client:
It calibrates only with a pH 7.5 calibration solution. No other probe would be suitable. Usually sellers don't specify anything.

Technical Advisor:
Both probes calibrate with 7.5. Does your current probe look like this one?

Client:
No, it's not at all like that - 12 mm in diameter.

Technical Advisor:
OK, then this one https://ph-redox-pool.com/gb/zodiac/118-pH-Probe-for-Zodiac-Tri-PRO-pH.html

Technical Advisor:
Thank you. Have a nice day.