本文着重论述使用信号分离技术对传感器的信号进行电分离后，得到与液体密度和粘度有关的两个独立的电信号，即两个方程。把这两个电信号用微机技术进行分解和数据处理，这样，就可以用单一传感器同时测量液体的密度和粘度两个理化参数。文中叙述了测量传感器的简单结构，对电路进行了分析。这种仪器具有响应速度快、精度高、使用方便等特点。由这种传感器制造的仪器可广泛用于石油、化工食品等各领域。 This article focuses on the use of signal separation techniques to electrically separate the sensor signal and obtain two independent electrical signals related to the density and viscosity of the liquid, ie, two equations. The two electrical signals using computer technology decomposition and data processing, so that you can use a single sensor to measure the density and viscosity of the two physical and chemical parameters. The article describes the simple structure of the measuring sensor, the circuit is analyzed. This instrument has a response speed, high precision, easy to use and so on. Instruments manufactured by this sensor can be widely used in petroleum, chemical and food fields.