System and method for measuring static volume in a material container

An apparatus configured to dispense assembly material on an electronic substrate, the apparatus comprising:

• a frame;
• a unit coupled to the frame, the unit being configured to deposit assembly material on the electronic substrate, the unit including a material cartridge coupled to a pressure regulator configured to deliver pressurized air to the material cartridge at a desired pressure, the material cartridge being configured to contain assembly material;
• a substrate support assembly coupled to the frame, the substrate support assembly being configured to support the electronic substrate;
• a controller configured to control the apparatus including the unit;
• and
• a system to detect static volume in the material cartridge, the system including a mass flow meter to measure a volume of air delivered to the material cartridge,
• wherein the controller further is configured to determine a volume of assembly material in the material cartridge upon determining the volume of air in the material cartridge.