An experimental rig was designed and commissioned to simulate the flow of gas-solid mixtures in pneumatic-conveying systems at industrial scales. In the rig, the flow rates and pressures of the gas and solid can be closely controlled by predefined control variables or by feedback, from a measured system parameter. This technique overcomes the problems of scale experienced in most research laboratories and vendor test centres. It also permits a wide range of operating conditions to be simulated in a short period of time using a small volume of the bulk material and hence reducing costs. Experiments with different modes of flow were compared with each other and with the works of other researchers. The advantages and current limitations of this approach are discussed.