Based on the charge transfer technique, the capacitance sensor and instrument for measuring water cut in oil are developed.
基于电荷转移法测量电容变量的原理，研制了一种电容式原油含水率传感器及其仪器。
2
By use of magnetic balance which is general physical experiment instrument, a simple and new method of measuring the charge-mass ratio of electron mass developed.
使用常用物理实验仪器磁天平，开发出用于近代物理实验测量电子荷质比的简易新方法。
3
A newly designed, very simple instrument for measuring the distribution of electric charge on the cloud droplets is described.