Correct calibration solution for various sensors: A guide

Client:
Which solution do I need for which sensor calibration?

Technical Advisor:
Hello

Client:
Hello

Technical Advisor:
Which brand/model controller do you have?

Client:
Infinity

Technical Advisor:
pH or redox?

Client:
Yes

Technical Advisor:
I think you need the pH7 and the 475 mV. You can read about it in the manual of your device. www.example.com

Client:
Okay

Technical Advisor:
👍