We use a lot of midspan PoE injectors here, rather than PoE switching1, and I recently burned out my third cable tester in the last 2 years by accidentally plugging into a line with an active injector.
Now I need to replace it, and I'd like to do a little better this time. This is just a basic continuity tester of the type that sells for < $10 on Amazon. I know I could spend a lot more on something fancy, but I'm still looking for a more basic device... I just want it to be able to survive the occasional PoE event.
The problem is I don't know what to look for.
What should I watch for in a product description or spec sheet for a cable tester that would tell me it's safe to plug into line with active PoE2?
1. That's another story... we're slowly changing this, but only as switches reach end of life, which is not fast.
2. I am well aware of Stack Exchange's long-standing practice against shopping questions, which is why I'm asking a "what feature to look for" question rather than a "what specific product to buy" question.