According to McIlvaine's World Gas & Air Pollution Monitoring Market, a global authoritative market forecasting agency, the global gas/water quality monitoring market reached 23 billion U.S. dollars in 2013, and the total revenue of TOP10 gas/water quality monitoring equipment company last year was 4.7 billion U.S. dollars. , accounting for about 20% of the global market, a slight decrease from the previous year, partly due to the growth of Asian suppliers. There are thousands of companies active in this market that sell less than $100 million. The entire market includes these companies that provide regular sampling. They often consist of a few individuals and invest in portable test instruments.

Emerson, on the other hand, has a complete air & water quality monitoring automation system and is a major supplier of oxygen and carbon monoxide combustion analyzers. This forecast includes distributed control systems and PLCs used in the monitoring process. In view of this, the TOP10 list includes not only Emerson, but also Yokogawa (Yokogawa), Siemens (Siemens), Invensys (Invissys) and ABB. Endress+Hauser and Thermo Fisher have the widest range of instruments, but because they don't offer a variety of software, they are not ranked at the top.

Some market segments in this market have grown at a double-digit rate. One of them is a continuous emission monitoring system for gas engines, and the other is a monitoring system for shale gas and oil extraction and processing. The highest growth rate segment is a continuous emission monitoring system for China's coal-fired boilers. This part of the market is mostly occupied by Chinese companies, even if the equipment purchase is an international tender. This increase is another factor that causes a slight decline in the market share of big instrument companies.