The control of oxygen and fossil fuels injections, taking into accountreal furnace conditions at each step of the melt, is essential for EAFimprovement. Based on near IR Laser- diode spectroscopy, a systemenabling dynamic and continuous CO and CO2 monitoring of EAFfumes during the whole melt for long-term operations has been developed.Several industrial trials are reported, the technology is describedand the results are discussed.