Measurement in two phase flow has always been a difficult and important research point. A three-layers wire mesh sensor(WMS) is manufactured to measure the important interfacial parameters in two phase flow. This paper carries out single bubble experiments to verify the measurement accuracy in principle. The mechanism of the three-layers WMS, the velocity and volume measure results and the image reconstructions of the flow field are presented in this paper. And the measurement error of velocity and volume and the distortion in the image reconstructions are analyzed in detail.