Correct Reference for pH Probe for QP Regulation: Technical Advice

Client:
What is the correct reference for the pH probe to regulate QP ref 619080?

Technical Advisor:
Hello. One moment.

Technical Advisor:
https://ph-redox-pool.com/gb/qp/1988-ph-probe--for-ph-qp.html

Client:
Thank you.

Technical Advisor:
Have a nice day.