Method for monitoring a jetting performance of a print head

Printing device for printing a droplet of an electrically conductive fluid, the printing device comprising

• a fluid chamber for holding an amount of the electrically conductive fluid;
• and
• an actuation assembly configured to expel droplets of the electrically conductive fluid from the chamber through a nozzle, the actuation assembly comprising
• a magnetic field generating unit for generating a magnetic field in at least a part of the fluid chamber;
• and
• an electrical current generating unit for generating an electrical actuation current in the electrically conductive fluid in the part of the chamber provided with the magnetic field, thereby generating a pressure wave in the conductive fluid in said part of the fluid chamber,
• an electrical signal detecting unit for detecting a resulting electrical current, which resulting electrical current is induced by a residual pressure wave in the part of the conductive fluid positioned in the magnetic field, thereby obtaining a detection signal.