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Inst Tools > Blog > Animation > Ultrasonic Flow Meters Working Principle

Ultrasonic Flow Meters Working Principle

Ultrasonic flow meters operate using difference in time travelled by the two ultrasonic waves is directly proportional to the flow velocity.

Last updated: November 1, 2023 5:48 am
Editorial Staff
Animation Flow Measurement
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Ultrasonic flow meters operate using the transit-time differential method. The Transit-time differential measurement is based on a simple physical fact.

Contents
Ultrasonic Flow MetersPros and Cons of Ultrasonic Flow Meters

Imagine two canoes crossing a river on the same diagonal line, one with the flow and the other against the flow. The canoe moving with the flow needs much less time to reach the opposite bank.

Ultrasonic Flow Meters

Ultrasonic Flow Meters Working Principle

Ultrasonic waves behave exactly the same way. A sound wave traveling in the direction of the flow of the product is propagated at a faster rate than one traveling against the flow (vAB > vBA).

Transit times tAB and tBA are measured continuously. The difference (tBA – tAB) in time traveled by the two ultrasonic waves is directly proportional to the mean flow velocity (vm).

Where,

  • tAB is the Time required for an ultrasonic wave to travel from Sensor A to B sensor
  • tBA is the Time required for an ultrasonic wave to travel from Sensor B to A sensor

Pros and Cons of Ultrasonic Flow Meters

Ultrasonic Flow Meters Advantages & Disadvantages

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Read Next:

  • Wedge Flow Meter Principle
  • Variable Area Flow Meters
  • Ultrasonic Level Sensor Principle
  • Calibrate Different Flow Meter
  • What is a Vortex Flow Meter?
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2 Comments
  • Amar says:
    June 2, 2017 at 9:55 am

    Pls, hindi version available ?

    Reply
    • S Bharadwaj Reddy says:
      June 2, 2017 at 2:01 pm

      Hi, Open Any Article > In Right Side bottom, you can find language translate option, select your required language.

      Reply

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