Various Standard Types Of Liquid Flow Meters

A flow meter is a tool that is used to ascertain the amount of liquid flowing through a pipe. Liquids are measured in terms of volume flow rate and mass flow rate. Liquid flow measurement is important to various industries. The industries are power, oil, water, and waste treatment. The industries use liquid flow meters to determine the amount being produced. It quantifies the liquid. It also detects leakages. The leakages may lead to wastage. A good flow meter should be of quality standard. It also should be very cost-effective. There are different types of cost-effective flow meters for measuring liquid. The most standard and cost-effective flow meters include:

Ultrasonic Flowmeter

These meters measure the speed of a fluid. The aim is to calculate the volume flow. Whenever the water flows in the pipe quickly, the frequency shift can be increased linearly. The transmitter processes the signals from the waves. Its reflections determine the flow rate.

These flow meters are cost-effective. They let you measure flow rate in a wide range of pipe sizes from 1 inch to more than 16 feet. You can do this by turning down a ratio of up to 400 to 1. They can also handle highly weakened pipe linings. They include mortar and ceramics. This is a high standard measure.

Differential pressure Flowmeter

This is a common flow meter in use. Statistics say that over 50 percent of all liquid flow measurement applications use this type. It consists of primary and secondary components. The primary component produces kinetic energy. The secondary component measures the differential pressure and raises a signal. This signal can be changed to get the flow rate. Differential flow meters are commonly used in the oil and gas industry. This unit should be properly matched to the pipe size, flow conditions, and the liquid’s properties. They are very cost-effective and easily installable.

Mass flow Meters

This is a meter that measures the mass of fluid flowing through a particular point per unit of time. This flow meter is of a high standard. These meters are the most efficient as they measure the force that is produced by the acceleration of the mass. Mass flow meters are used by mining and water waste. Mass flow meters are relatively cost-effective. This is because they are suitable for clean and dirty liquids. They are also suitable where temperatures and pressures change.

Open Channel Flow Meters

It refers to the liquid flowing on the surface. It examines the flow rate by measuring the depth of water. It has two types, Weirs and flumes. These dam-like structures allow for a limited or concentrated free flow of liquids according to the shape and size of the structure.

Velocity Type Flow Meters

These meters measure the velocity of the stream to calculate the volume flow rate. It translates the velocity of water into its volume. When the flow meter is used with Reynolds’s number greater than 10,000, the flow meter becomes callous to the viscosity change of the fluid. They measure the flow of a wide range. They include turbine and electromagnetic.

Positive Displacement Flow Meters

They measure the volume filled with liquid. They transport it further and fill it again. This way, it measures the volume of liquid being transferred. In contrary to other types of liquid flow meters, a positive displacement flow meter measures the actual flow of liquid without calculating a different parameter. It then converts values into the flow rate. These are of high standards. These flow meters are the only ones that can directly measure the volume of liquid passing through the flow meter. They achieve this by trapping small amounts of fluid between rotating components within a high precision chamber.


A liquid flow meter measures the mass or volume flow of liquid. The difference in the functional method and technical aspects is based on their areas of application, operational values, and the nature of liquid that is being measured on them. They are important to a broad range of industrial sectors. Price is a reasonably good indicator of a flow meter’s limitations. As applications get harder, the number of flow meters that work will decrease, and the price of the flow meter that can perform well in that application will increase. The price of those flow meters will drop.


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