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Draw ultrasonic flow meter and explain its construction.

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Construction : Figure shows the construction of time difference type ultrasonic flow meter. This consists of two transmitters and two receivers. These are separated by distance l and mounted as shown in figure. Transmitter A transmits the waves pulsed of short duration in the direction of receiver A, this favor the wave as it is in direction of flow. Transmitter B transmits the waves pulsed of short duration in the direction of receiver B, this do not favor the wave as it is opposite to the direction of flow.

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