Flow Measurement

(1) Flow meter: a sight flow indicator is used to check whether the working fluid is flowing or not by simple visual inspection. Another type is a cone flow meter or a flapper type flow meter in which a
gauge is embedded.

(2) Flow meter with an electric contact: an electric contact is attached to a cone flow meter or a flapper type flow meter.

(3) Flow meter for continuous signal output: the following types are available. i . Positive displacement flow meter (gear motor)
ii. Turbine flow meter
iii. Ultrasonic flow meter
iv. Differential pressure flow meter
Positive displacement flow meters are widely used in hydraulic equipment. Sometimes, they are comprised of a hydraulic motor and a pulse encoder.

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