TA - 3.0 independent research and development in our company is to make a tiny adjustment on the basis of TA - 2.0, where the instrument shell adopts 304 stainless steel design, greatly improving the equipment adaptability in different environments. It can meet the choice of two different schemes for the single point of real-time monitoring or multiple point time-division monitoring, not only meeting the requirements of national laws and regulations, but also saving investment, where we have several successful cases.