The present invention relates to an irradiation device for irradiating objects with electron beams. The irradiation device comprises at least one electron beam emitter having an electron exit window and at least one sensor device for detecting a first dose control parameter of the electron beam. The electron beam emitter is adapted to move past the sensor device such that the electron beam emitted from the electron exit window passes within a sensing area of the sensor device. The sensor device comprises more than one conductor each having a conductor surface in the sensing area of the sensor device, and the conductor surface is adapted to be exposed to electrons of the electron beam. The invention also relates to a method.
