Electromagnetic Field Readers, often called EMF meters, are devices used to measure the strength and direction of electromagnetic fields in the environment. These fields are produced by various sources, including electrical appliances, power lines, and wireless communication devices. EMF readers can help identify areas with high electromagnetic radiation, which some people believe may affect health. These devices typically display readings in units like milligauss (mG) or microtesla (µT). EMF readers are commonly used by professionals in fields such as electromagnetic compatibility, environmental science, and building biology to assess exposure levels and ensure safety standards are met.