Why Should You Know About Flow Meters And Their Applications?

Why Should You Know About Flow Meters And Their Applications

Why Should You Know About Flow Meters And Their Applications? 

Meta Description: Do you want to know more about flow meters and their applications? Read this post to understand why you need to know about a flowmeter and its various applications.

There are devices meant to measure or monitor substances like liquid, stable, and gasses in various industrial processes. These measuring devices make work easier and measurements accurate.

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When measuring liquids and gasses, devices called flow meters are used. The Flow measurement process is essential and is used in many applications. When using a measuring device, accuracy is necessary because it determines various functions in a system.

This post will look into flow meters, their various applications, and why they are essential in everyday life and industries. Before delving deep into it, let’s explain what a flowmeter is.


What Are Flow Meters? 

Sometimes when measuring the flow of fluids and gases, an action or actions need to be performed to make the system function work at optimum conditions. This requires more than just devices that show reports. In such cases, flow meters are used to monitor and regulate the flow of fluids or gas. A flow meter is a tool or device used to accurately facilitate flow measurement.

Flow meters are classified as follows:

  • Venturi Tube
  • Differential Pressure
  • Flow Tube
  • Orifice Plate
  • Flow Nozzle
  • Variable-Area (Rotameter)
  • Target
  • Positive Displacement
  • Elbow Tap
  • Reciprocating Piston
  • Pitot Tube
  • Oval Gear
  • Vortex Shedding
  • Nutating Disk
  • Swirl
  • Rotary Vane
  • Electromagnetic
  • Velocity
  • Ultrasonic, Doppler
  • Turbine
  • Ultrasonic, Transit Time
  • Open Channel
  • Coriolis
  •  Weir
  • Mass
  • Flume
  • Thermal


Units Used in Measuring Flow 

Flow meters are the best instruments for measuring the flow rate of liquids gases. The unit used for measuring flow will depend on the function and the parameters set to monitor the flow rate. Flow measurement units also vary based on the system and the type of substance.  

In measuring liquid and gas flow, these are the units used:

  • Liquids – Liquids are according to density: gallons per minute or liters per second 
  • Steam – Steam measurement is based on weight: kilograms/ minute or tonnes per hour
  • Gases – The unit used for measuring gas is based on energy content: British Thermal Unit/ day or Joules/ hour

Changes can also be made in the unit used based on the medium of the substance being measured. Teams used to measure gases, liquid, and steam can change according to various factors that affect their density.

In liquids, the pressure will determine its volume while pressure and temperature determine density in gases.


Significance of Measuring Flow

Flow meters are of great importance when it comes to accuracy in many applications. Most of the time, flow meters are used to ensure safety in many industries that deal with various hazardous liquid chemicals and gases. To make the most of the flow meters, they need to be installed properly. Failure to install flow meters correctly may lead to functionality and resource wastage.


Applications of Flow Meters

Flow meters come in five distinctive types: Positive Displacement, Differential Pressure, Mass and Open Channel, and Velocity.

Let’s look at each one of them to find what their functions are when measuring liquid flow.


  • Positive Displacement Flow Meters

Oval gear, reciprocating piston, rotary vane, and nutating disk are examples of flow meters that use the positive replacement principle when measuring liquid flow. These types of flow meters use fitted rotors to measure the fluid flow rate. The rotors are used to shift known and fixed. The volume of the displaced fluid is proportional to the spinning of the rotors. What counts the number of rotations is an integral electronic pulse transmitter. The Flow rate and volume are 

derived from the converted information.

Why Should You Know About Flow Meters And Their Applications

  • Differential Pressure Flow Meters

Some of the differential pressure flow meters include flow nozzles, pilot tubes, venturi tubes, orifice plates, target meters, elbow-tap meters, and variable area meters. Differential flow meters are popularly used in different industries to measure the regulated liquid flow rate. Almost half of the world’s flow meters consist of differential flow meters.

The principle behind this type of flowmeter is that there is a drop in the flowmeter; the rate is calculated by the square of the number of the flow rate. The square root of the pressure differential measurement is taken to get the flow rate.

The primary and secondary parts make up a differential water flow meter. The change of movement energy is caused by the primary element, which adds differential pressure in the pipe. The second part provides the signal readout by calculating the pressure differential to get the flow value.


  • Velocity Flow Meters

Some of the velocity flow meters available in the market include vortex shedding, turbine, swirl, Coanda Effect & Momentum Exchange, electromagnetic, ultrasonic, Doppler, and Transit time. Get the flow rate in these meters. The speed at more than one flow point is measured. The pace is then integrated over the entire flow area.

In the petroleum pipeline industry, turbine flow meters are used to detect leaks along the pipeline. Turbine flow meters are also used in their transportation industry to load hydrocarbon products into tankers and rail cars. They are also common in oil drilling, fuel, and chemical sectors.


  • Mass Flow Meters

Coriolis and thermal meters are two examples of mass flow meters. Coriolis water flow meter is popularly used among the two. When it comes to processes such as heat transfer, chemical reactions, and other flow measurements that require higher accuracy levels, Coriolis gives the best results. Mass flow meters are commonly used in the mining, power, wastewater, and pharmaceutical industries.


  • Open Channel Flow Meters

Open channel flow meters include Flume and Weir. Any area where fluid or liquid flow is called an available channel. These are areas such as rivers, streams, non-pressurized sewers, canals, and tunnels. Depth-related methods are generally used to monitor open-channel flows. The depth of water is used to calculate the instantaneous flow rate.



Finding and installing the right type of water flow meter is the first thing. You need to do to get accurate flow rate measurements. Other external factors also need to be into consideration when choosing the right flow meter solution. They include the environmental condition and the budget you have set aside to buy the flow meter.

Naman Modi is a Professional Blogger, SEO Expert & Guest blogger at proteusind.comHe is an Award-Winning Freelancer & Web Entrepreneur helping new entrepreneurs launch their first successful online business.

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