In order to promote the application of plasma anemometer

we established a radio frequency（RF） glow discharge anemometer experimental system with automatic control

and experimentally investigated and analyzed the RF pin-pin discharge at atmospheric pressure constant flow

low-velocity steady flow and fluctuant flow. Moreover

we investigated the voltage and current properties and the effects of wind velocity

and analyzed the restrictions of average air velocity and its fluctuation frequency. The experimental results demonstrate that oxidation occurs when tungsten electrodes discharge in the atmosphere

which has an effect on electrode space. Therefore

the discharge time should not be too long in this experiment. The root-mean-square（RMS） voltage of plasma anemometer is linearly related to wind velocity in low speed range（5～45 m/s）. The RMS voltage fluctuates when the wind speed exceeds 30 m/s because of repeating extinguishment and breakdown phenomenon

and the fluctuation frequency is linearly related to wind velocity. Dynamic flow of frequency at 500～1 500 Hz can be well measured with RF plasma anemometer.