A nozzle housing is disclosed for a disposable fluid delivery system of an electrostatic applicator. The nozzle housing includes an air supply inlet port configured to be in fluid communication with and receive a nozzle end of an air supply tube. A voltage cavity port is configured to receive a tube with a voltage wire. A delivery outlet can be at a distal end of the nozzle housing opposite a luer inlet port, the delivery outlet configured to receive a delivery tube of a luer and in fluid communication with the air supply inlet port.

A method is disclosed for operating an electrostatic applicator system, including inserting a disposable cartridge into a chamber housing of the electrostatic applicator system such that a voltage contact at a first end of a voltage wire within the first disposable cartridge contacts a voltage contact of the electrostatic applicator system; and a first end of an air supply tube within the first disposable cartridge fluidly connects with an air supply port of the electrostatic applicator system; and causing, by an activation input to the electrostatic applicator system, a motor to actuate and a voltage potential to be delivered to a delivery tube of the first disposable cartridge.