Qingdao Rongguang Electronic Technology Co., Ltd. was established in June 2010 with a registered capital of 10 million yuan; Mainly research and develop environmental monitoring equipment and laboratory quality control equipment. The company passed the national high-tech enterprise certification and ISO9001 management system certification in 2015, and currently has 30 employees, 90% of whom are R&D personnel; The company has a comprehensive weighing laboratory with the ability to perform pre-treatment, constant temperature and humidity weighing, and data analysis for low concentration heads of filter cartridges; There are three research and development departments, mainly responsible for developing a constant temperature and humidity weighing system for filter cartridges, a low concentration sampler for fixed pollution sources, a gas leak remote trigger sampler series, a grid based upper computer monitoring software platform, and its monitoring equipment.