KIN-TEK’s AutoBlend is a computer-controlled, multi-channel gas blending system for supplying a continuous flow of adjustable composition test gas mixture. Applications include sensor evaluation, analytical methods development and validation, contaminant effects testing, catalyst testing, odour simulation, gas filter testing and other applications requiring complex test gas mixtures. The system can add multiple trace concentration components to a flowing gas stream. Permeation tubes are used to add trace components to the gas mixture. Concentrations from hundreds of parts-per-million down to low parts-per-trillion can be added. Component concentrations can be varied independently, making the AutoBlend an ideal tool for conducting statistically designed test programs.