You must be careful when buying wood. Very few suppliers will admit to owning a moisture meter so they can simply claim that it has been drying for a while with out having to lie to you.
Very few moisture meters will test the majority of exotic woods available and for the ones that do test them, you will need there adjustment numbers.
The wagner is nice but is still limited to wood of specific gravities of .30 - .70 (bocote, cocobolo, all ebonies, osage, ironwoods, purple heart, and goncalo alves are all over .70 and can't be acurately read with this.) can be difficult to know for sure unless you have the history of the wood.
Ligno has a list of woods and there numbers of adjustment for there meters. not even they have all the numbers either.
Best of luck, BigJim