The Anglo Platinum Bubble Sizer is a portable device to measure both the bubble size distributions and the superficial gas velocity Jg directly within a flotation cell. With the mean bubble size db and Jg the bubble surface area flux Sb can be calculated: Sb = 6Jg/db

The superficial gas velocity Jg is defined as the amount of air passing through a flotation cell per cross-sectional area per unit time and is a direct measurement of air flow rate. The Anglo Platinum Bubble Sizer can be used to calculate Jg by measuring the time taken t to displace a known volume of water (distance between two marks L) by air bubbles in the perpex tube above the viewing chamber. Jg = L/t