Understanding Paddle Wheel Flow Metres
There are numerous varieties of flow metres, each with its own set of benefits and drawbacks. Among the most prevalent varieties are:
Paddle wheel flow meters are very common in the measurement of corrosive liquids. The majority of plastic paddle wheel flow meters come in PVC, PP or PVDF materials.
There are two types of paddle wheel flow metres – the inline-paddle wheel flow meter and the insertion type paddle wheel flow meter.
Positive displacement flow metres measure flow rate by repeatedly trapping a fixed volume of fluid and counting the number of times the volume is filled. Nutating disc flow metres, rotating piston flow metres, and oscillating piston flow metres are examples of positive displacement flow metres.
Velocity flow metres: These metres determine the flow rate by measuring the velocity of the fluid. Paddle wheel flow metres, turbine flow metres, vortex flow metres, and ultrasonic flow metres are examples of velocity flow metres.
Mass flow metres calculate the flow rate by measuring the mass of the fluid going through the metre per unit of time. Coriolis flow metres, thermal mass flow metres, and magnetic flow metres are examples of mass flow metres.
Differential pressure flow metres: These metres measure the flow rate by measuring the pressure difference across the flow metre. Orifice plate, Venturi, Pitot tube, and flow nozzle are examples of Differential Pressure flow metres.
Open channel flow metres monitor flow in open channels such as rivers, irrigation canals, and municipal stormwater systems. Weirs and flumes are examples of open channel flow metres.
Ultrasonic flow metres: These metres determine the flow rate of a fluid using the time of flight measuring technique. They detect fluid velocity by timing the transit of ultrasonic pulses through the fluid stream, which are emitted and received by transducers.
It’s important to note that the best type of flow metre for a given application is determined by the fluid’s specific properties, such as viscosity, density, and temperature, as well as the measurement conditions, such as the required accuracy, range of flow rates, and whether the fluid is flowing in a closed pipe or an open channel.
Find out more about flow metres.
If you have any specific applications or queries concerning any flow metre types, please contact us. Icon Process Controls would be delighted to discuss your application in greater depth.
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