Gas flow standards group has been developing, maintaining and disseminating the national primary measurement standards of gas flow and air speed. We also performing research and development of the flow measurement technology.

1. Small gas flow standard consists of the small constant volume tank and the weighing system. Calibration service is provided by using various gases such as air, nitrogen, argon and helium.

2. Medium gas flow standard covers 5 m³/h to 1000 m³/h by using the large constant volume tank and the closed loop calibration facility. The working fluid is air and the pressure can reach to 500 kPa. Also, performance test of various types of gas flowmeter is performed.

3. Air speed standards consist of low air speed (0.05 m/s to 1.5 m/s)、medium air speed (1.3 m/s - 40 m/s)、high air speed(40 m/s - 90 m/s). Each of them is realized by a dedicated calibration facility.