An EMF Detector is a device used to measure electromagnetic fields (EMF) in the environment. These fields are produced by various electronic devices, power lines, and even natural sources. EMF detectors can help identify areas with high levels of electromagnetic radiation, which some people believe may have health implications. These detectors come in various types, including analog and digital models. They typically display readings in milligauss (mG) or microtesla (µT). Common uses for EMF detectors include assessing the safety of homes, workplaces, and even investigating paranormal activity, as some enthusiasts believe that spirits may influence EMF levels.