An acoustic method on sulfur hexafluoride concentration detection

A dual-channel detection method based on the acoustic attenuation characteristics in gas for sulfur hexafluoride concentration is presented. The difference of classical attenuation coefficients of two channels as a function of sulfur hexafluoride concentration is derived and numerically simulated. A dual-channel detection device is designed using ultrasonic transducers with specific center frequency to build up the experimental platform to verify the effectiveness of the proposed scheme experimentally. Experiments demonstrated that the dual-channel acoustic detection method is nearly linear when sulfur hexafluoride concentration changes in the mixture.