Compatibility and differences between the Davey 16166SP, 16166, and PH-1-3-3239 probes.

Client:
Hello, is the Davey 16166SP probe the same as the 16166? If not, is the 16166 compatible with the Davey Lifeguard?

Technical Advisor:
Send me a photo of your current probe, no need to disassemble it, I will check.

Client:

Technical Advisor:
This one https://ph-redox-pool.com/gb/davey/3240-orp-probes--for-promatic-lifeguard.html

Client:
What's the difference with REFERENCE: PH-1-3-3239?

Technical Advisor:
Sorry, you're right, the 3239 is a pH probe, which is what you need. The one I suggested to you is a redox probe. https://ph-redox-pool.com/gb/davey/3239-ph-probes-for-promatic-lifeguard.html

Client:
What is the difference between pH and redox?

Technical Advisor:
The pH measures the water's acidity, and the redox measures the chlorine level.