Pin-type moisture meters work on a primitive, resistance principle that basically measures the flow of electricity through a substance. This method is subject to many environmental variables that can dramatically affect readings such as chemicals in the water trapped within the wood and the temperature of the wood. Pin-type moisture meter readings must always be corrected for any difference in temperature above or below 70 degrees F. Wagner Meters use advanced electromagnetic wave technology and are sensitive to the actual moisture content of the wood.
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