Device and method for measuring the injection quantity of injection nozzles, especially for motor vehicles

A device for measuring the injection quantity of injection nozzles (30), in particular for motor vehicles and in particular in production testing, the device comprising

• at least one measuring chamber (22) that is at least partially filled with a testing fluid (60),
• a coupling device (28) that can couple at least one injection nozzle (30) to the measuring chamber (22) in a pressure-tight manner,
• a detection device which detects a state change of the testing fluid (60) in the measuring chamber (22) at least intermittently during an injection by the injection nozzle (30), and
• a processing unit (58), which, based on the signal from the detection device, determines an injection quantity that corresponds to the state change,
• the detection device including a capacitor whose one electrode is comprised of an electrically conductive fluid (62), which is at least partially contained in a volume connected to the measuring chamber (22), and
• the processing unit (58) being connected to the capacitor in such a way that it can detect a change in its capacitance, which is produced by a movement of the electrically conductive fluid (62).