A moisture meter is a device used to measure the moisture content in materials like wood, concrete, soil, and building materials. It works by using electrical resistance or dielectric properties to determine water levels within a sample. There are two main types: pin-type meters, which use probes to penetrate the material, and pinless meters, which use electromagnetic signals. Moisture meters are widely used in industries like construction, agriculture, and woodworking to assess the risk of mold, wood decay, or structural damage. Accurate moisture readings help prevent damage, ensure product quality, and maintain healthy environments.