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Check Water Quality and Flow Rate with Water Flow Meter

water flow meters- Check Water Quality and Flow Rate with Water Flow Meter

Water flow meters are instruments that we use to measure the quantity of water moving through a pipe or a channel. You can use many water flow meters based on the type of application, the budget, and the maintenance needed. Water flow meters measure cold water, hot water, clean water, dirty water, and slurries. The standard procedures we use in water measurement are the displacement and velocity flow meters. Every type uses the benefits of many industries—however, both help check the quality of water in a pipe.

Paddlewheel Sensors

It is usually cheap and the most popular known water flow meter. It also measures the flow rate of water or fluid substances. Most of the paddlewheel sensors come with flow fittings. It would help if you had a straight pipe diameter of ten meters on the inlet and five on the outlet to insert the paddlewheel’s rotor perpendicular to the flow rate. The pipe connects with a bit of cross-section of the flow. Let’s see some of the types of water flow meters for the quality measurement of liquids.

Positive Displacement Flowmeter

It is a type of water flow meter suitable in operations where you cannot get a straight pipe. It helps in the measurement of viscous liquids. The positive displacement meter shows a scale of the gas volume flow rate and the moving fluids. It will need some fluids to bring out some particles from the meter to assist in analyzing the flow in a usual way. It does this by breaking the media into set measured masses. The devices have chambers that prevent the media flow and the rotating device. The rotating device allows for the outcome of fixed volumes. The amount of fluids moving through the cross-section area sees it as the mass media. The rate of revolving helps to obtain the flow rate. Let’s look at some of the positive displacement flow meters.

Types of Positive Displacement Flow Meters

Oscillating or Reciprocating Piston

In this type of positive displacement flow meter, there is automatic conduction of piston to help fill the cylinder that carries fluids and brings it out. Every stroke outlines less analysis of the moving liquid.


This type of flow meter depends on the gears located inside. The equipment usually rotates when fluids pass or get into contact with them. There are many types of gear meters. They are typically given names depending on the size of inside parts.

Oval Gear

Two rotating gears have an arranged teeth press in an oval gear with fewer fluids flowing through every rotating meter. For this device to operate, you need to fix the two oval gears, on oval gear, or even rotor within a cylinder. When the fluids move through the cylinder, it will cause the rotor to turn. Therefore, an increase in the flow increases the turning or rotation velocity of the rotor.

water flow meter

Rotary vane

It keeps on revolving the vanes. It helps in dividing the areas between the vanes, all the turnings, and the size.


The movement of the fluid occurs inside the revolving diagram. It is then spread into the outlet. The movement of the diaphragm helps in determining the flow rate. Other types of positive displacement flow meters include; helical gear and nutating disk.

Magnetic Water Flow Meters

Magnetic water flow meters do not have moving parts. For this reason, it measures the flow rate of wastewater or dirty water, which are good conductors. It uses the speed of the moving fluid inside a pipe by employing a magnetic field to adjust the volumetric flow. Magnetic flowmeters operate Faraday’s law of electromagnetic conduction to obtain the liquid flow rate.

Ultrasonic Flowmeters

It measures the flow rate of dirty liquids, slurries, and wastewater. The flow meters work under the principle of frequency change of the ultrasonic signal. You will notice it if the reflection of the gas bubble replaces the moving particles. It is sometimes mentioned as the Doppler effect. They usually undertake the speed of the moving fluids inside a channel or pipe by employing ultrasound. The ultrasound helps in the measurement of volumetric flow. On transit time, ultrasonic flow meters usually bring a sign depending on how the fluid flows, either downstream or upstream. To repair these kinds of devices, you need an electrical technician and also available with a guarantee card.


The application you need to operate will determine which water flow meter you would want to use. There are flow meters that perform better in specific applications than in others. You can consult system operators to help you choose the best type of water flow meter for you to get perfect and reliable results. It would improve if you also considered how much the flow meter costs.