An apparatus is configured to dispense assembly material on an electronic substrate. The apparatus includes a frame and a unit coupled to the frame. The unit includes a material cartridge coupled to a pressure regulator configured to deliver pressurized air to the material cartridge at a desired pressure. The material cartridge is configured to contain assembly material. The apparatus further includes a substrate support configured to support the electronic substrate and a controller configured to control the apparatus including the unit. A system to detect static volume in the material cartridge includes a mass flow meter to measure a volume of air delivered to the material cartridge. The controller is configured to determine a volume of assembly material in the material cartridge upon determining the volume of air in the material cartridge.

An apparatus is configured to dispense assembly material on an electronic substrate. The apparatus includes a frame and a unit coupled to the frame. The unit includes a material cartridge coupled to a pressure regulator configured to deliver pressurized air to the material cartridge at a desired pressure. The material cartridge is configured to contain assembly material. The apparatus further includes a substrate support configured to support the electronic substrate and a controller configured to control the apparatus including the unit. A system to detect static volume in the material cartridge includes a mass flow meter to measure a volume of air delivered to the material cartridge. The controller is configured to determine a volume of assembly material in the material cartridge upon determining the volume of air in the material cartridge.