Density meters and concentration meters are used across a wide range of industrial applications. Here we will look at some of their uses as well as the basics of how they function.

A density meter is a device that measures the density of a substance. Density in this case refers to the mass per unit of a substance, such as a gas or liquid. Sometimes, density is measured by gravity or "relative density." The latter describes the density of the substance as it compares to another substance.

What is Density?

If you were to fill a room with gas, the volume of the gas would be the same as the volume of the room. It would not change as you added more gas into the room. Volume is measured purely by the space that something occupies. Meanwhile, the mass would be based on the weight of the gas and the amount of space it takes up. If you were to continue pumping more gas into the room, the volume would not change but the mass would. The latter would technically be heavier.

Measuring the weight of gas is sometimes difficult. One solution is to take a small portion of the gas and see how many particles are present within that space. You would thus be able to measure its density.

The density might vary in different parts of the room depending on how the gas has dissipated or spread out. Over time, however, the density in a room would become entirely uniform (assuming it were completely undisturbed).

Density Meter and Concentration Meter Applications

There are numerous applications for density meters. The devices are commonly used in scenarios where hydrostatic weighing or mass/volume calculations are insufficient. As illustrated in the example above, density throughout a given space sometimes varies based on the distribution of the measured element (e.g. gas). In such cases, it's only through the use of a density meter that mass/volume ratios can be measured with accuracy. Concentration meters meanwhile measure the concentration of a substance that has been mixed in a similar manner.

Density meters can be built into appliances or they can be used as hand-held digital meters. They are often used in the pharmaceutical industry, the food and beverage industries and when dealing with chemicals or petroleum. Here they can be used for quality control as well as in research.

The beverage industry offers a good example. Consider the process of mixing a drink in a large vat before sealing it in individual bottles. Here measuring the concentration of particular elements would be important for each bottle in order to maintain a consistent taste. Use of a density meter makes that possible, and even simple.

These devices work by measuring the oscillation of a glass tube that contains the sample. They are highly accurate and repeatable and provide the kind of reliability that is necessary for research applications.

As a production manager, your goal is to streamline the processes of your application and thereby reduce costs and the number of errors. One of the biggest challenges you face is measuring the density of various elements in your application. Choosing the right density meter can help you meet your production targets. At Applied Engineering, our goal is to help you select the tools and solutions you need for success.