Guest guest Posted January 20, 2011 Report Share Posted January 20, 2011 mei, Moisture meters don't really measure mositure. They measure the resistance between two penetrating pins or the capacitance between two flat pads on the surface of the instrument. The " electrical " field of the latter penetrates 1/2 to 3/4 inch below the surface and will " see " lower resistance below the surface. If there is metal in the wall like electrical conduit, wiring, or metal studs, or metal reinforcements in the cabinet, then the meter will indicate the resistence in that spot is lower. As with Infrared Red cameras the operator has to know that false readings are possible and how to determine if they are measuring moisture or something else. If the same spot continues to show " moisture " in the same area and pattern, especially on a verticle surface, for as long as you say, then it may be " measuring " metal instead of moisture. Carl Grimes Healthy Habitats LLC ----- Is the moisture meter a penetrating type or a non-penetrating? The penetrating has two sharp pins you poke into the surface. The non-penetrating has no pins, but two pads on the bottom flat surface of the instrument. The reason I ask is either one can show moistur The bathroom toilet water line leak while we were away. The window was slightly open when the outside temperature was around 20- 30 F and indoor thermastat was set to 52 F. It causes the ceiling of the kitchen downstairs to drip water. Three spots of the cabinets also showed signs of water. The restoration company came in, used thermal camera to check, opened up the ceiling a few places to put in dry air. After three days the big machines were taken away. I did a moisture check on the cabinets with a moisture meter. There are two sides of the same cabinet are wet, one side even has bulked out. Although the rest of the cabinets tested to be fine. I asked the restoration company to come back to check again, they told me the moister meter is not accurate, and he believes the cabinets are now All dry, it is impossible to just have two sides of cabinets wet and all the rest are fine. Instead of taking the questionable cabinet down and look at it, he made a hole behind the cabinet and did an swap and air collection for mold testing. The Wet cabinet in the first floor kitchen is under a suspected leaking pipe on the roof, the pipe was replaced now. However, the second floor , which is directly under the pipe did not get any visible problems. Is it necessary to take the cabinet down to check this? It has been tested Wet for about a month now. mei Quote Link to comment Share on other sites More sharing options...
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