...But we're hoping you put one of these inside your tank so everyone can see it...
Interesting thought.
I currently have all the ugly probes and stuff in my sump.
But that does have downsides. PH is not the same due to skimmer aeration.
So if it is small enough with no wires ... I could put it in main display tank.
Although temp probes really need to be in the same container as the heating element.
If return pump stops, that would be bad. Hmm..