Multi-sensor void probe is efficient to measure the local parameters of two-phase flow such as bubble interface velocity. In general, meniscus due to surface tension is formed and shape of the gas–liquid interface deforms when an object contacts the gas–liquid interface. The deformation of the interface by penetration of the front sensor affects the penetration time of the rear sensor, and as a result, an error can occur in the measurement of the bubble interface velocity. The characteristics of the meniscus formation around the sensor was investigated and the error in the measurement of the interface velocity was evaluated. It was clarified that the size, shape of the sensor and the contact angle of the sensor surface affect the error in interface velocity measurement as well as the interface velocity itself, and no measurement error would occur in air-to-water penetration by using a sensor with a large surface contact angle. A double sensor void probe was applied to bubbly flow to measure the bubble interface velocity. The measurement error due to the meniscus also occurred in the actual experimental measurement. It was shown, that it is necessary to use only the velocity of the lower surface of the bubble or to make certain appropriate error correction for the velocity of the upper interface of the bubble.

多传感器空隙探头可以有效地测量两相流的局部参数，例如气泡界面速度。通常，当物体接触气液界面时，会由于表面张力而形成弯液面，并且气液界面的形状会变形。由于前传感器的穿透而引起的界面变形会影响后传感器的穿透时间，结果，在气泡界面速度的测量中可能会出现误差。研究了传感器周围弯液面形成的特征，并评估了界面速度测量中的误差。澄清了传感器的尺寸，形状和传感器表面的接触角会影响界面速度测量的误差以及界面速度本身，使用大表面接触角的传感器，在空气对水的渗透中不会出现测量误差。将双传感器空隙探针应用于气泡流动以测量气泡界面速度。在实际的实验测量中也出现了由于弯液面引起的测量误差。已经表明，仅需使用气泡下表面的速度或对气泡上界面的速度进行一定的适当的误差校正。