Nitrogen Oxygen Sensor suppliers Introduction Now that SCR has been embraced by all sectors of the diesel transportation industry, it is that much more important for automotive service professionals to understand how SCR works. It鈥檚 taken some time, but the diesel world appears to have reached consensus on how to meet the Environmental Protection Agency鈥檚 (EPA) 2010 NOx Sensor suppliers website:http://www.xichuang-catalyst.c....om/nitrogen-oxygen-s