Appropriate sensors for the Blue Lagoon BL530 dosing system: A consultation

Client:
I have a dosing system Blue Lagoon BL530, which sensors can I use?

Technical Advisor:
Hello, one moment please...

Technical Advisor:
https://ph-redox-pool.com/gb/etatron/373-orp-probe-for-dlxb.html
https://ph-redox-pool.com/gb/etatron/300-ph-probe-for-dlxb.html

Client:
Thank you very much! And do they really work?

Technical Advisor:
Yes, our guarantee: https://ph-redox-pool.com/gb/content/15-compatible-or-refunded

Client:
Thank you!

Technical Advisor:
You're welcome.

Client:
I will open a customer account right away.

Technical Advisor:
Thank you. Have a nice day.