For moisture it it must read something like 15%, im not sure on the
exact % you must have, you need to research that before you install.
Humidity is not the same as wood moisture. I would test the concrete
also, one meter will do both, that will let you know what treatment is
needed. A 20$ meter, maybe, On E bay they are alot more than 20. I have
a Delmhorst or delmhurst? 250$