Wenzhou Osmark Sensor Co., Ltd. is a national high-tech enterprise based in the National University Science Park of Wenzhou, Zhejiang. Since 2006, we have specialized in the R&D, production, and sales of oxygen sensors for motor vehicles. Our product range includes thimble, planar, wide-band, and A/F ratio sensors—covering over 1,800 models and serving markets in North America, Europe, the Middle East, and more.
We’ve built a complete original sample database to ensure product-to-vehicle accuracy and hold over 10 patents for sensor core technologies. With full in-house manufacturing capabilities and advanced equipment, we also provide custom development based on client samples and specifications.
In 2014, we developed the core technology for wide-band sensors, recognized in 2016 as a major tech project in Wenzhou. Backed by a skilled team and IATF 16949 certification, we pursue excellence with a “craftsman spirit” to create lasting value for customers.