FD-100 moiture tester is a handy, easy-to-use high frequency moisture tester.Operation is simple: Simply press the unit against the surface of the wood after setting the type of wood. This unit calculates the moisture value. Furthermore, because the measurement range of the unit is 0-100%, you can use the unit to test the moisture of many types of wood/plywood. This unit can also be used for the sorting of each moisture standard and final testing. The FD-100 is truly a product you can trust.