Everything about Flow Sensor totally explained
A
flow sensor is a device for sensing the
rate of fluid flow. Typically a flow
sensor is the sensing element used in a
flow meter, or flow logger, to record the flow of
fluids.As for all sensor absolute accuracy of a measurement requires a functionality for
calibration.
There are various kinds of flow sensors and flow meters, including some that have a vane that's pushed by the fluid, and can drive a
rotary potentiometer, or similar device.
Other flow sensors are based on sensors which measure the transfer of heat caused by the moving medium. This principle is common for
microsensors to measure flow.
Flow meters are related to devices called
velocimeters that measure
velocity of fluids flowing through them. Laser-based
interferometry is often used for
air flow measurement, but for liquids, it's often easier to measure the flow. Another approach is
Doppler-based methods for flow measurement.
Hall effect sensors may also be used, on a flapper valve, or vane, to sense the position of the vane, as displaced by fluid flow.
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