The McGill Bubble Viewer System is an advanced experimental setup for precise gas dispersion measurements, particularly in flotation and other gas-liquid systems. It operates by collecting bubbles through a water-filled vertical sampling tube and then imaging them in a specially designed chamber using a high-resolution digital video camera. The captured images are subsequently processed with commercial software to automatically size the bubbles. This system provides critical data on bubble size distribution, which is essential for understanding, optimizing, and troubleshooting flotation processes and other industrial applications involving gas-liquid interfaces.