eijing Jantytech (BJJT) was founded in 2002. We are one of the earliest manufacturers which has independently R&D department to design and manufacture sound, light and thermal environment monitoring equipment in China. Since its establishment, Beijing Jantytech has been committed to the development of environmental monitoring sensors and intelligent instruments for environmental monitoring more than ten years. With rich and professional experience, we have developed a series of environmental monitoring instruments and updated them in order to follow the market. Beijing Jantytech has its own professional calibration laboratory and production base. In the process of our development, we obtained dozens of patents and software copyrights. We has participated in the preparation more the 10 national and industrial standards in China, and has undertaken a number of scientific research projects supported by Beijing Science and Technology Commission. We also has passed the ISO9001 quality management system certification for many years.