Free-Field Type

Models AD-20, 40, 55, 70, 80, 100
AD Model electric field D-Dots are small to medium, free-space, high frequency sensors that measure time rate of change of electric displacement. 

Model AD-65

Ground Plane Type

Models AD-10, S10, 30, S30, 60, S60, 110, S110, 180, S180
PRODYN’s precision high frequency ground plane electric field sensors are designed to measure time rate-of-change of electric displacement over a wide frequency spectrum.

Model FD-5
FD-5 sensors are small high frequency D-Dot sensors designed to measure time rate of change of electric displacement from near DC to > 50 GHz.