Customer service resolves unstable pH probe: Defect detected and replacement promised.

Client:
Hello! I bought a probe from you. PH probe for jd dual 40 60 90 Ref: PH-1-3-0290 Article 290
Unfortunately, it's not working. The probe fits, but the pH value is jumping very unstably up and down.

Technical Advisor:
Hello
Possibly the sensor is defective. Please perform this test https://ph-redox-pool.com/gb/content/16-ma-sonde-ph-est-elle-hors-service-
https://ph-redox-pool.com/gb/content/16-ma-sonde-ph-est-elle-hors-service-
Sorry

Client:
Thank you. I'll do that.

Technical Advisor:
Please share the results and your name with me, if you purchased the probe from us. We will replace it for you if necessary. Thank you.

Client:
I will. Yes, we bought it from you. Christine Hollauf.

Technical Advisor:
Thank you.

Client:
Does the probe need to be completely filled with liquid?
Our old one was completely filled and this one is only half filled with liquid.
Good morning.
Does the probe need to be completely filled with liquid?

Technical Advisor:
Hello
Can you take a photo?

Client:

Technical Advisor:
Based on your information, the probe is defective. We will send you a new probe today.