Hun Hunan Gri Instrument Co., Ltd. Founded on Environmental Science and Technology Industrial Park in Hunan Province in 2008, our company is a high-tech enterprise based on advanced sensors and instrumentation design, development, and production, the company is mainly specialized in the development, production and marketing of various types of sensors, transmitters, analytical instruments, monitoring and control instrumentation, industrial modules, data acquisition; R & D and marketing of various types of environmental monitoring systems, process control systems, special control system application software and embedded systems; installation and maintenance services of various types of environmental monitoring projects, process control engineering; our products widely used in the telecommunications, electric power, petrochemical, environmental protection, medical, security testing, HVAC, etc.