Ningbo Auto-Eco Automotive Electronics Co., Ltd., hereinafter referred to as auto-eco, is based on auto (automobile) and eco (economic and environmental protection), reflecting the company's commitment to the development of automobile environmental protection. The company has developed and replaced 5wk9 series nitrogen and oxygen sensors at home and abroad. The products cover Volkswagen, Mercedes Benz, BMW, PSA, Scania, Daf, Man, Hino, Hyundai, Kia, Doosan, Isuzu, caterpillar, Volvo, Renault, Chrysler, Iveco, Fuso, John Deere and other manufacturers. Nitrogen and oxygen sensors are mainly used in diesel trucks and diesel passenger vehicles to detect automobile exhaust pollution and control the pollution of exhaust to the environment. If the nitrogen and oxygen sensor product with insufficient accuracy is used, it will have a negative feedback impact on the engine ECU, so as to increase fuel consumption, increase urea injection and reduce the service life of post-treatment SCR. We use high-quality ceramic chips and accurate software algorithms to achieve high linearity and high repeatability in this environment. Our products have the same performance of continental 5wk9 series nitrogen and oxygen sensors in nitrogen oxide detection, and can replace their products of the same model, which is deeply recognized by our customers.