Shanghai Yuyan Technology Co., Ltd. (hereinafter referred to as "Yuyan Technology") is mainly engaged in the development, manufacturing and sales of high-performance sensors and detection instruments. The company was established in December 2015 and is located in Zhangjiang Hi-Tech Jiading Park.

Since its establishment, Yuyan Technology has always adhered to the enterprise development belief of "research and development of high-performance sensors and detection instruments", focusing on independent research and development of water quality and gas analysis instruments, providing professional analysis and testing instruments and in-depth solutions for subdivided application fields of semiconductor, nuclear power, power plants, boilers, chemical and petrochemical, iron and steel, metallurgy, papermaking, cement, food and beverage, pharmaceuticals and other industries.

The trace dissolved oxygen sensor and analyser independently developed by Yuyan Technology are far ahead of their peers in response speed under the premise of ensuring high sensitivity and low detection limit, breaking the monopoly of foreign giants on the high-end dissolved oxygen market.