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Flow Measurement

What is a Ultrasonic flow meter ?

S Bharadwaj Reddy
Ultrasonic flowmeters measure fluid velocity by passing high-frequency sound waves along the fluid flow path. Fluid motion influences the propagation of these sound waves, which may then be measured to

What is a Positive displacement flow meter ?

S Bharadwaj Reddy
A positive displacement flowmeter is a cyclic mechanism built to pass a fixed volume of fluid through with every cycle. Every cycle of the meter’s mechanism displaces a precisely defined

What is a Weigh Feeder ?

S Bharadwaj Reddy
A special type flowmeter suited for powdered or granular solids is the weighfeeder. One of the most common weighfeeder designs consists of a conveyor belt with a section supported by

What is a Magnetic flow meter ?

S Bharadwaj Reddy
When an electrical conductor moves perpendicular to a magnetic field, a voltage is induced in that conductor perpendicular to both the magnetic flux lines and the direction of motion. This

What is a Paddlewheel flow meter ?

S Bharadwaj Reddy
A variation on the theme of turbine flow measurement is the paddlewheel flowmeter, a very inexpensive technology usually implemented in the form of an insertion-type sensor. In this instrument, a

What is a Turbine flow meter ?

S Bharadwaj Reddy
Turbine flowmeters use a free-spinning turbine wheel to measure fluid velocity, much like a miniature windmill installed in the flow stream. The fundamental design goal of a turbine flowmeter is

Weirs and Flumes Flow Measurement

S Bharadwaj Reddy
A very different style of variable-area flowmeter is used extensively to measure flow rate through open channels, such as irrigation ditches. If an obstruction is placed within a channel, any

What is a Variable Area flowmeter ?

S Bharadwaj Reddy
An variable-area flowmeter is one where the fluid must pass through a restriction whose area increases with flow rate. This stands in contrast to flowmeters such as orifice plates and

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