A water flow meter measures how much water moves through a pipe, channel or process. Different technologies suit different flow ranges, pipe sizes and operating conditions.
Mechanical Flow Meters
Mechanical meters use moving internal components. They are economical and widely used in residential, commercial and irrigation applications.
Turbine Flow Meters
A turbine rotates in proportion to fluid velocity. These meters can provide useful flow-rate measurement where the water is reasonably clean and operating conditions are suitable.
Electromagnetic Flow Meters
Electromagnetic meters are commonly used for conductive liquids. They offer no conventional moving measuring element and can work well in industrial water and wastewater applications.
Ultrasonic Flow Meters
Ultrasonic meters calculate flow using sound. Some designs are inline; others can use clamp-on sensors. They can be attractive where low maintenance or non-intrusive measurement is important.
Digital Water Flow Meters
Digital describes the output and electronics rather than one single measurement principle. A digital meter may use turbine, ultrasonic, electromagnetic or another sensing technology.
How to Select a Water Flow Meter
Pipe Size
The meter must suit the pipeline and expected flow.
Flow Range
Select using actual minimum, normal and maximum flow.
Fluid
Clean water, process water and wastewater can require different technologies.
Pressure
The body, seals and connections must match system pressure.
Temperature
Hot-water or process applications may require special materials.
Accuracy
Required accuracy depends on whether the meter is used for billing, process control, monitoring or irrigation.
Output
Possible outputs include pulse, analog, Modbus, M-Bus or wireless communication.
Residential Applications
Residential meters prioritize compact size, cost and billing performance.
Industrial Applications
Industrial flow meters may need higher pressure, digital communication, larger sizes, chemical resistance and process integration.
Irrigation Applications
Agricultural projects may prioritize large flow capacity, rugged construction, simple field maintenance and totalization.
Procurement
For B2B purchasing, provide suppliers with actual operating data. WMConstr can compare Chinese flow meter manufacturers based on fluid, pipe size, flow range, output, pressure and project quantity.