Capacity dividing electric field probe

The utility model relates to a capacity dividing electric field probe, belonging to the electromagnetic measuring device field and relating to an electric field sensor. The device is characterized in that the prior photoelectrical electric field probe is replaced by the capacity dividing electric field probe, and a capacity divider is used for sampling the electric field; the signal of a low voltage arm is processed by a filter, etc., transformed into a frequency signal by a voltage/ frequency transforming element, and then transmitted to a lower computer at a low voltage end through an unshielded twisted pair or an optical fiber; the capacity divider and a signal processing unit are positioned in an internal cavity of a post type organic insulator and integrated with the organic insulator. The electric field probe is used in the online monitoring of the vacuum of a vacuum switch to judge the change of the electric field around the vacuum arc extinguish chamber caused by the change of the vacuum. The probe is simple in structure and convenient in industrial realization, eliminates the defects of the common photoelectrical probe whose crystal units are unstable in the temperature, and is low in cost and high in reliability.