| 摘要 |
An inkjet printer comprising an inkjet printhead containing a substantially closed duct comprising an exit opening used to eject ink drops from the duct, characterised in that the duct comprises two electrically conducting parts, each of which having been fitted to a duct wall, these elements extending to the vicinity of the exit opening and forming a capacitor together, and the inkjet printer furthermore being fitted with a measuring device in order to determine the capacity of the capacitor. |
