CEM
Shenzhen Huashengchang Technology Industry Co., Ltd. (CEM) was established in 1991. It is a national high-tech enterprise integrating professional independent design, research and development, production and sales of various measuring instruments. It is the chairman unit of Shenzhen Instrument and Automation Industry Association, the vice chairman unit of China Indoor Environment Purification Industry Alliance, the vice chairman unit of Guangdong Indoor Environmental Sanitation Industry Association, and the editor of the "Infant Indoor Air Quality Classification" standard and the "Filter Air Purifier Particle Purification Performance Classification" standard. It is the drafting unit of the national standard "Infrared Human Surface Temperature Rapid Screening Instrument".