Patent ID: 8786290

Claim:
A corona sensing system, comprising: a scorotron including a corona wire and an insulating mount, where the scorotron is energized by applying a current to the corona wire and corona effluents are generated; a corona sensing device, including: a support member; a first electrode and a second electrode placed on the support member; a semiconducting film disposed on the support member and the first and second electrodes, the semiconducting film comprising an organic charge transporting material; and a first wire lead and a second wire lead allowing for connection of the first electrode and the second electrode to an external resistivity monitoring circuit; and an external resistivity monitoring circuit comprising an ammeter and a constant voltage power supply for detecting corona effluents generated by the applying of the current to the corona wire, the corona effluents detected by monitoring for any decrease in resistivity through the semiconducting film with the external resistivity monitoring circuit as indicating the presence of corona effluents.