A new experimental technique for measurement of size-dependent settling velocities of particles in polydisperse suspensions tin which particle sizes are distributed continuously is developed. The new technique employs a continuously fed column, operating at steady state. The size-dependent average hindered velocities of particles present in the column an obtained using the framework of population balances. The proposed technique requires just two measurements of size-specific number densities, one at the inlet to the column and the other at some point in the middle of the column. The present technique avoids the difficulties with having to observe a multitude of diffused moving fronts in earlier experimental methods, which are also limited to polydisperse suspensions of widely disparate particle sizes. The effects due to multi-body interactions, and surface and inter-particle forces are subsumed by the measurement technique. The technique is also capable of determining velocities of all particles from the dilute limit to the dense over the entire range of polydispersity. Results for many emulsions show good agreement with well-known predictions in the dilute limit. More significantly, substantial deviations in particle speed are measured in dense systems for small particles while the largest particles are accurately represented by the well-known Richardson and Zaki correlation. The technique is capable of measuring the effects of numerous additives, such as glycerin, salts, and gums on creaming dynamics.