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DJ－2型油水界面检测仪的传感器是由振荡电路、检测电路和发射天线等组成。发射天线将振荡电路产生的电磁波直接发射到油水乳状液中，根据朗伯—贝尔定律，两种性质不同的液体介质吸收不同的电磁波能量，振荡电路所提供的电磁波能量就会不同，再将这种差别通过检测电路以电流的形式反映给检测仪控制器，实现对油水界面的连续检测与控制。该传感器设计结构紧凑合理，安装、维护方便，为石油、化工等部门的油水界面检测，提供了一种有效的方法。
DJ-2 oil-water interface detector sensor is the oscillation circuit, the detection circuit and the launch antenna and other components. According to Lambert-Bell law, two kinds of liquid media with different properties absorb different electromagnetic energy, and the energy of the electromagnetic wave provided by the oscillating circuit will be different, and then, the electromagnetic wave generated by the oscillating circuit will be transmitted to the oil- The difference is reflected by the detection circuit in the form of a current to the detector controller to achieve continuous detection and control of the oil-water interface. The sensor design compact structure, easy installation, easy maintenance, oil, chemical and other departments of the oil-water interface testing, provides an effective method.