An electric field (E-field) probe is a long, spherical probe-capped wand which detects unsafe levels of RF emissions and gives operators data on the electric field in an area. E-field probes are also used in anechoic chambers, OATS locations as well as other unique applications such as monitoring emissions off aerospace and military systems. An E-field probe generally consists of a dipole antenna, readout device, RF detector and non-perturbing transmission lineE-field probes monitor voltage levels up to 1,000 V/m in frequencies as low as 5 kHz up to 60 GHz.