Established in 1991, Shenzhen Huashengchang Technology Industrial Co., Ltd. (CEM) is a national high-tech enterprise that integrates professional independent design, research and development, production, and sales of various measuring instruments and meters. The company always adheres to quality first and continuously improves its management system, gradually establishing a comprehensive product quality management system. Since 2004, it has passed ISO9001 quality certification and ISO13485 medical quality system certification, meeting customers' requirements for product quality. The company has won honors such as "National High tech Enterprise", "Top 100 Taxpaying Enterprises", "Shenzhen Famous Brand" and "Leading Enterprise" in its development process. It is the chairman unit of the Shenzhen Instrument and Automation Industry Association, the vice chairman unit of the China Indoor Environment Purification Industry Alliance, the vice chairman unit of the Guangdong Indoor Environmental Sanitation Industry Association, a participating unit in the compilation of the "Classification of Indoor Air Quality for Infants and Young Children" standard and the "Comprehensive Performance Classification of Particle Purification for Filter Air Purifiers" standard, and is the drafting unit of the national standard for non-contact infrared human rapid screening instrument. Since its establishment, the company has upheld the spirit of continuous innovation and has successfully developed a series of products with independent intellectual property rights, including infrared thermal imagers, particulate matter PM2.5 air quality detectors, laser rangefinders, non-contact human body thermometers, industrial infrared thermometers, digital multimeters, digital clamp meters, power testers, photometers, noise meters, anemometers, gas detectors, alcohol testers, formaldehyde testers, coating thickness gauges, industrial endoscopes, differential pressure gauges, and multifunctional testing instruments; At the same time, we continuously innovate new technologies and currently have over a hundred valid patent rights both domestically and internationally. The product is widely used in professional fields such as national defense, power, HVAC refrigeration, fire protection, petrochemicals, smelting, electronic manufacturing, rail transit, environmental governance, etc., and is highly trusted and praised by customers around the world.