Comparison and troubleshooting of ORP probes: Promatic Life Guard Davey and Ecosalt 2

Client:
Hello, I bought an ORP probe for the Promatic Life Guard Davey last year. It's giving inaccurate readings. Is it the same as the Ecosalt 2?

Technical Advisor:
Hello,
Try troubleshooting it like this: https://ph-redox-pool.com/gb/content/17-is-my-redox-probe-out-of-order