Chongqing Chuanyi Automation Co., Ltd. manufactures and sells industrial automation instruments and devices, electronic information materials, and devices in China and internationally. Its products include temperature instruments, pressure/differential transmitters, flow meters, level meters, electric actuators, control and special valves, analytical instruments, automatic control systems, gas analyzers and systems, liquid analyzers and systems, and laboratory analyzers. The company also provides rail transport and environmental protection solutions, such as PSD/APG systems, train electrical traction systems, distributed sewage treatment devices, and desulfurization and denitration products. In addition, it offers metallic functional materials, sapphire and ruby materials, and services including industrial automation EPC, operation and maintenance, valve maintenance and remanufacture, environmental EPC, system integration, general contracting, and rail transit EPC. It serves the power, metallurgy, chemical, nuclear, light, building material, rail transit, municipal engineering, and environmental industries. The company was formerly known as Chongqing Chuanyi Plant Co., Ltd. and changed its name to Chongqing Chuanyi Automation Co., Ltd. It was incorporated in 1999 and is based in Chongqing, China.