What is Water Flow Meter?
The volume of water flowing into a pipe is measured by a water flow meter. Depending on the water calculation application, maintenance needs, and budgetary constraints, there are many water flow meter systems to choose from. Each of these types of water flow meters has its operating theory, application advantages, and total cost of ownership.
Types of Flow Meters
Water flow meters are devices that are used to monitor how much water is consumed. It uses a variety of methods to determine the overall volume of water used by each outlet. These meters are placed at various locations to detect water leaks. While modern technology has resulted in multiple flow meters, the positive displacement meters are two of the most widely used meters? Compound meters are instruments that incorporate the characteristics of each of these meters. These instruments primarily employ a valve system that guides water flow through both meters, making it simple to receive readings from both.
1. Positive Displacement Meter
A small chamber contains a measured amount of water in these meters. The flow of water is measured and compared to the amount of liquid previously retained. The number of times the chamber is filled and drained is used to measure the fluid flow rate. These devices are often used in homes and apartments because they are suitable for calculating low flow rates.
2. Velocity Meters
These instruments calculate the volume of water flow by measuring the rate of the liquid flow. To monitor speed and decode data, these devices employ a variety of mechanisms. Ultrasonic, venture, multi-jet, electrical, orifice, propeller, and other meters are commonly used. Both of these instruments measure the velocity of the flow. It’s well-suited to high-flow environments, but it’s widely used in companies that deal with many liquids. Compared to analog meters, optical water flow meters gain a lot of traction in the new market. Since digital devices are reliable and precise, they are used in science and commercial fields. Optical flow meters use a variety of techniques and mechanisms. The two most popular types of digital instruments are magnetic flow devices and ultrasonic devices. The data on digital display devices is relatively simple to read. It’s also possible to link the data to the pipe systems’ valves and change the flow accordingly. The knowledge from the digital system is therefore readily accessible to the operators.
Major types of water flow meter
1. Turbine water flow meter
A turbine flow meter, the most popular and cheapest way to calculate water flow, measures the speed of water flowing through a pipe with a spinning turbine or piston, generally in the form of a propeller, shunt, or paddle wheel. The speed of the spinning blades determines the volumetric flow rate of the water. Unfortunately, in muddy or chunky water, such as process water, these meters will clog, increasing repair costs so for those applications.
2. Vortex water flow meter
Vortex water flow meters work by measuring the vortices generated by a sensor submerged in the flow. Vortices are natural forces that form as a fluid passes around an obstacle, such as water flowing through rock in a stream or wind passing through a flagpole. In a vortex meter, a sensor tab flexes from side to side as each vortex passes by. The volumetric flow rate is directly proportional to the frequency output. With a single process link, multivariable vortex flowmeters can calculate up to five process variables: volumetric flow rate, mass flow, density, pressure, and temperature. Since they can be placed into the flow by hot tapping with a retractor, insertion vortex meters, perform well on large pipes.
3. Water flow meter with ultrasonic technology
Ultrasonic water pressure meters measure volumetric flow by measuring the speed of a fluid flowing through a vessel. An ultrasonic pulse is sent downstream in the direction of the moving fluid in a transit-time ultrasonic liquid flow meter. Then, upstream, another signal is sent toward the moving fluid. The time it takes for the sonic pulse to travel downstream is equivalent to the time it takes for the call to travel upstream in its most simplistic form. The velocity of the moving fluid is then calculated using the differential time. The meter then calculates the volumetric flow rate in the pipe using this fluid velocity. The volumetric flow rate and the temperature difference between the hot and cold legs can also calculate BTU capacity. Clamp-on ultrasonic meters fire sound waves into the pipe walls to track water pressure from the outside, making them suitable for measuring water flow in large pipelines for many applications.
4. Electromagnetic water flow meter
Finally, electric water flow meters calculate flow using a magnetic field and Faraday’s law of induction. A charge is generated by liquid passing through a magnetic field. As a result, as the fluid moves further, it generates more voltage, equal to the water’s movement. The voltage is then converted into a flow rate by the flow meter. Since magnetic water flow meters aren’t accurate, they can’t be used to move custody. They can’t count ions in plain water, so they can only be considered water movement meters with a certification. Depending on the manufacturer, there might be a bewildering array of liners to choose from. Chemical compatibility, flow velocity, and possible abrasion is all factors to consider in your application. As a result, this knowledge will play a role in determining the right liner for your submission.
5. Electromagnetic process flow meter
Since chunky liquids can clog turbine or vortex flow meters, electromagnetic flow meters are ideal for measuring process water flow. Keep in mind that the process water dictates the equipment you use. Any chemicals will harm your flow meter, reducing its lifetime. You’ll need a Teflon liner to resist corrosion if the process water contains chemicals. If everything fails, use polyurethane or rigid rubber liners.
The best kind of water flow meter depends on the application; different flow meters perform well for various tasks. To find the best Sierra flow calculation product for your water and liquid flow use, watch videos, read white papers, and use selection software. Since certain flowmeters perform better than others, the application specifics decide the best water flow meter type. Making an educated decision will save you a lot of time and resources, so don’t hesitate to contact us if you’re still unsure.