Design and develop experimental devices for Gas circulators instrument from multiple perspectives such as saving raw materials, environmental protection and energy saving, and R D innovation. Through the experimental case of measuring the oxygen content in the air, it’s obvious that the application of this Gas circulator instrument can force gas in a closed system circulate in one direction, which is convenient for the gas to be fully absorbed. Appropriate use of this Gas circulator instrument is in line with the concept of green environmental protection.