Why is Liquid Density and Flow Important ?

Handling fluids requires accurate measurement processes for proper management and efficiency of products. Flow measurements apply in many industries, including processing plants, power generation, and energy facilities. Failure to use proper equipment, especially when determining flow rate, may lead to resource wastage and hazardous working conditions. The right type of flow meter is essential for measuring steam and air precision or measuring density in liquids.

Benefits of Density in When Measuring Flow 

Inflow measurement, getting accurate liquid flow density, is important because it plays a huge role in a fluid property component. When mass is divided into volume, it equals density. In any particular fluid, its properties rely on the type of fluid and the effects of the environmental conditions. Even though both oil and water are all liquids, they don’t have the same density. The same applies to hot and cold water – they don’t have the same density. There are three ways to get density in flow measurement applications. If you want to get accurate measurements when using flow meters, consider matching the right application. 

Types of Density Flow Measurement in Liquids 

Direct Measurement 

When measuring liquids and gases, the density is measured directly using density meters. 

Measurement of Fluid Components 

A good example when using flow meters to get the density of a natural gas. To get the amounts of various components within that gas, chromatography is used to analyze it. The density of the whole sample is then obtained by calculating the density of individual components. 


The measurement of pressure and temperature is used to infer a particular fluid’s density in the inference type of fluids measurement. Its simplicity makes this type of flow measurement the most popular method. Using temperature and pressure measurements costs much less than depending on a densitometer chromatograph.

Major Benefits of Temperature and Pressure on Density and Fluids Measurement 

Because most fluids are non-compressible, they cannot be easily influenced by pressure. Therefore, calculating the temperature of fluids to determine density compensation is the only necessary process. There is a constant change in many applications. The temperature fluctuations bring this about. What remains static, however, is the fluid composition. 

Types of Flow Meters Used to Measure Liquid Flow and Density

So, to get the flow rate and density, what are the most effective flowmeters? You need to understand that different flow meters are affected by density in many ways. Magnetic and turbine flow meters are examples of volume flowmeters that are not affected by density fluctuations. The signal output from such meters produces readings in terms of gallons per minute or liters per minute.

V-Cones and orifice plates are examples of differential flow meters that rely on density. The reason for this is that such flow meters are based on Bernoulli’s theorem. Regardless of whether the flow meter measures in mass or volume flow rate, this is a fact. Coriolis and thermal flow meters are examples of mass flow meters that take direct flow rates. They produce signal outputs that are read in pounds/minute. 

How is Density Measured in a Coriolis Flow Meter? 

Based on the Coriolis Effect that states – “It is the deflection of the moving objects when they are viewed in the reference of the rotating frame,” these types of flow meters make direct density and mass flow measurements. Coriolis flowmeters measure flow rate by presenting into the flow stream an artificial Coriolis acceleration. Deflection of the fluid occurs inside the flow meter resulting in generated forces that lead to slight twisting and distortions of the measuring tube. The twisting and distortions are directly related to the mass flow rate. The output is converted into a signal by special sensors which pick up on these distortions. 

Various benefits come with using Coriolis mass flow meters. One of them is that they can give flow, temperature, and density measurements of liquids and gasses within a single meter. These types of flow meters provide high accuracy since the measuring principle does not rely on fluid properties. They make great alternatives to other types of flow meters because they don’t have moving parts. This also makes them easy to maintain. The problem with the Coriolis type of flow meters is that they are costly compared to other flow meters. 


As we’ve seen, measuring density is important when using flow meters. Knowing the density helps to get accurate flow measurement when dealing with fluids. However, choosing the right kind of flow meter in an application makes the system safe and efficient. You should consider this when you want to buy a flow meter. 

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