In June 2023, a laboratory teacher from the China Petroleum Research Institute found a nitrogen generator from Hangzhou Anyan Instrument, which required 15L and 99.999% gas production. It should be used in conjunction with the laboratory mass spectrometer and can also be connected to the laboratory nitrogen blower. According to the teacher's requirements, it is recommended to use a pressure swing adsorption nitrogen generator with a gas production capacity of 30L and a purity of 5 9s. At the same time, the equipment size and installation environment were confirmed. Hangzhou Anyan also provided technical on-site installation training, and the teacher expressed satisfaction. After a series of process comparisons, the nitrogen generator from Hangzhou Anyan Instrument was finally selected. The contract was signed in August 2023 to complete the payment, and Hangzhou Anyan also delivered it on time and provided on-site training. Successfully put into use.