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在研究物质特性，液体密度是极为重要的参数。测量液体密度的仪器也是现代生产中的重要量具之一。本文介绍了一种新型自动测量液体密度的方法和仪器、该仪器是利用阿基米德液体浮力原理研制成功的液体密度自动测量仪器。论述了浮子—弹性体—电容传感器组成的复合传感器原理。新型液体密度计配备了IBM486计算机，自动进行多种控制和数据处理。因此，该仪器具有稳定性好、灵敏度高、测量范围宽、自动化程度高、自动测量、自动进行密度－温度换算和自动存储的功能和特点。它不仅可以用于原油及其产品的测量，还可以广泛用于化工、轻工、冶金、食品和医药卫生等领域。
In studying the physical properties, liquid density is a very important parameter. Instruments for measuring liquid density are also one of the important gauges in modern production. This paper introduces a new method and instrument for automatic measurement of liquid density. The instrument is an automatic liquid density measuring instrument developed by using the principle of Archimedes liquid buoyancy. Discussed the float - elastomer - capacitance sensor composed of composite sensor principle. The new liquid density meter comes equipped with an IBM 486 computer that automatically performs a variety of controls and data processing. Therefore, the instrument has the features of good stability, high sensitivity, wide measurement range, high degree of automation, automatic measurement, automatic density-temperature conversion and automatic storage. It can not only be used for the measurement of crude oil and its products, but also widely used in the fields of chemical industry, light industry, metallurgy, food and medicine and hygiene.