Water flow meter types have special functioning principles, unique benefits, and costs. A water flow meter is used to measure the amount of which flows through a pipe. We have several working principles to choose from, depending on the application, maintenance needs, and budget.
The four major water flow meter types include turbine, vortex, ultrasonic, and electromagnetic. This blog will make you know about them and help you select one for your application.
Water flow meter types
Turbine water flow meter
The most common and low-cost way to measure water flow, a turbine flow meter. It is used to determine the speed of the water running through a pipe with a rotating turbine in its normal propeller, shunt, or paddle wheel design.
The volumetric flow volume of the water is similar to the speed of the rotating blades. But these meters can block in dirty or chunky water, like process water, which adds to the maintenance price. So for those applications, it is good for the electromagnetic ways flow meters. These flow meters also don’t function appropriately with low flow.
Vortex water flow meter
With the vortex flowmeter, a sensor tab flexes in one side as every vortex flows past, giving a frequency directly proportional to the volumetric flow rate.
Multivariable vortex meters give five ways variables with one connection: volumetric flow rate, mass flow, density, pressure, the temperature. The vortex meters will do well on such large pipes since you can insert them with hot tapping with a retractor.
Ultrasonic water flow meter
This type of water flow meter uses ultrasound to determine the flow. A transit-time ultrasonic meter sends one signal downstream to another upstream. Then the meter differentiates the travel time for both signals to get the flow velocity. Then, it uses this calculation to get the volumetric flow rate. You may also determine the energy and temperature by using differences between the hot and cold legs.
The camp on the ultrasonic meters determines the water from outside the pipe by sending signals via the pipe walls. This makes them ideal for measuring flow in huge pipes and a wide range of various processes.
Electromagnetic water flow meter
This water flow meter uses a magnetic field with the law of induction to determine the measured flow. Liquid flowing via a magnetic field makes a charge. So if the fluid flows at high speed, it makes more voltage, proportional to the flow of the water. This type of flow meter then processes the voltage to the flow rate.
Electromagnetic water flow meters lack great accuracy, so you can’t use them for custody transfer. They also don’t operate on freshwater as it has no ions to measure. Hence they are called water flow meters qualifying.
According to the brand, you may also have a confusing range of liners to select from. You have to know the chemical compatibility, flow velocity, the capability abrasion in your application. These details will decide your choice of the good liner for the application you need.
Electromagnetic process flow meter
Electromagnetic flow meters are normally best to determine process water flow as the chunky liquids can block turbine or vortex flow meters.
You should know that your process water determines the equipment you will use. Other chemicals can attack your flow meter then reduce its lifespan. When the water you use has chemicals, you’ll have to use a Teflon liner to prevent corrosion.
The best water flow meter type is known by the details of your application, as other flow meters will do well compared to others in some situations. You will save time with energy when you make an informed selection.