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A rotameter is a device that measures the volumetric flow rate of fluid in a closed tube. [1] It belongs to a class of meters called variable-area flowmeters, ...
A Thorpe tube flowmeter, a type of variable-area flowmeter, or a rotameter, is an instrument used to directly measure the flow rate of a gas in medical instruments. It consists of a connection to a gas source, a needle valve opened and closed by turning an attached dial for control of flow rate, a float resting in a clear tapered tube, and an ...
An LVDT (Linear Variable Differential Transformer) Variable Area Rotameter, is a meter designed to measure the flow rate of a fluid or gas. [citation needed]
A mass flow meter of the Coriolis type. A mass flow meter, also known as an inertial flow meter, is a device that measures mass flow rate of a fluid traveling through a tube.
Rotameters are available for a wide range of liquids but are most commonly used with water or air. They can be made to reliably measure flow down to 1% accuracy. Another type is a variable area orifice, where a spring-loaded tapered plunger is deflected by flow through an orifice.
Schematic view of a flow sensor. An ultrasonic flow meter is a type of flow meter that measures the velocity of a fluid with ultrasound to calculate volume flow. Using ultrasonic transducers, the flow meter can measure the average velocity along the path of an emitted beam of ultrasound, by averaging the difference in measured transit time between the pulses of ultrasound propagating into and ...
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Magnetic flow meter Electromagnetic flow meter Electromagnetic flow meter. A magnetic flow meter (mag meter, electromagnetic flow meter) is a transducer that measures fluid flow by the voltage induced across the liquid by its flow through a magnetic field.