The first meter on the market to measure %MC in Drywall using a calibrated scale, the BD-2100 moisture meter is perfect for any building inspection or restoration job. The BD-2100 also features a wood scale and a numerical reference scale for measuring relative humidity in other non-wood materials. Features: Digital readout. Three scales: Wood Scale - 6% to 40% moisture range. Reference Scale reads from of 0 to 100 on a relative basis. Drywall Scale - 0.1%-50% moisture range. Averages up to 100 accumulated readings. Set-point alerts you to when a pre-selected MC is reached.