Handheld Moisture Meter
Pin-type moisture meters function by measuring the electrical resistance between two electrodes. When moisture is present within wood, for example, electricity flows more easily from one pin to the other. Conversely, wood that is becoming dryer will resist electrical flow. This resistance is actually measured in ohms and then converted to a percentage we call either WC% or WME%
For wood, the moisture content is expressed as percent moisture content (%MC). For other materials, the measurement is expressed as a wood moisture equivalent (%WME).
Please note, some moisture meters have a pinless mode that does not use pins to stick in the wall, ceiling, etc. We use moisture meters that have both options (pinned or pinless). There are two simple reasons we use these.
- Pin-less meters are not as intrusive. The pins can put tiny holes in the wall, which would be fine in areas near baseboards, popcorn ceiling, studs, etc. However, if there is an area we want to check where even tiny pins would be noticeable, we have the option to use pinless.
- Pin-less meters can check materials that cannot be easily penetrated. This includes things like tile, ceramic, plaster walls, etc.