An electronically controlled gas flow dilution system. This dilution system is configured to allow dynamic, real-time dilution of a sample gas before said gas flows through a detector. A flow sensor measures total gas flow from both an independent source (of diluent gas) and gas flowing from a standard combustion system. Said flow sensor, in conjunction with other system components, allows the system operator to evaluate and manipulate concentration of the sample gas as it passes through a detector. Finally, this system provides for a range and accuracy of detection, with respect to sample concentration, simply not possible with available systems.