Conceptual Reference Database for Building Envelope Research |
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| Essay:Moisture detection equipment-manufacturers"Moisture meters are designed to measure the moisture content of various building materials such as wood, gypsum board, plaster, concrete, brick, roofing and insulation. Moisture meters are used for quality control to ensure proper moisture levels of building components prior to installation. They also are utilized to detect problems after construction. Electric moisture meters use known relationships between electrical properties and moisture levels in materials that are hygroscopic (able to absorb water from the environment). The moisture meters come in two varieties: conductance and dielectric.Conductance meters have two to four metal probes, or pins, that are physically inserted into the building material. They read the moisture content of the material through the electrical conductance detected between electrodes. Higher moisture levels facilitate better electrical conductance, thus higher moisture readings. Moisture level displays for these conductance meters include analog (needle indicator) and digital (alphanumeric indicator) displays. Digital displays utilize liquid crystal (LCD) or light-emitting diode (LED) technology. Since wood species affect the readings, these meters are commonly calibrated to default settings for Douglas Fir. Dielectric-type moisture meters are noninvasive-they do not physically puncture the material. They generate an electrical field through flat platens located on the bottom of the meter. These, in turn, analyze characteristics about the electric field to generate a moisture content reading. Moisture display options for this meter type are identical to the conductance-type meters: analog and digital. -- (Toolbase.org )
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Other Companies: Wagner Electronic Products, Inc. Lignomat
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