Wood Moisture Meter Pin-Type Water Leak Detector Damp Tester,LCD Backlity Display- Sensor for Moisture in Wood Concrete Drywall

I have a drip on the ceiling of my living room, we open the ceiling and there is a drip between the pipe and the wall. I already talked to several plu

What is the setting for oak? I have mostly oak for my firewood.

Since silky oak is not the same as hardwwod oaks (such as pin oak, which is what I have), which is the proper calibration code for hardwood oaks?

Does this work with plaster walls?