In day-to-day use, electromagnetic field (EMF) meters are used to diagnose problems with electrical wiring and power lines and to get readings on working appliances. On television, professional ghost ...

EMF Radiation Meter---Measuring a variety of EMFs from 50 Hz to 20,000 Hz, it can register mobile phones within 2 feet. EMF levels are measured to prevent potentially harmful long-term overexposure to ...