This EM Field Sensor enables the EM Eye Meter to be transformed into an EMF Meter, Power Density Meter and EIRP Meter.The EM Eye Meter detects and measures high frequency electric fields that may be present in equipment, tools, and circuit boards or in any process in a manufacturing area.The EM Eye Meter also measures high frequency electric fields from mobile phones, over-the-air TV signals, wireless LANs, and any other source generating fields within its specification.