207i Ultrasonic Flow Meter

How Does a Water Flow Meter Work?

So how do water flow meters actually work?

A flow meter is a device that will measure the amount of liquid/steam/gas that flows through a pipe. There are several flow water flow meter technologies available to choose from, choosing the right flow meter will depend on the measurement application, maintenance requirements and the big one - budgetary considerations.

Read More about how a Flow Meter works.
Ultrasonic Transit Time Flow Meters

Ultrasonic Flowmeters - Transit Time

An ultrasonic flow meter is a type of flow meter that measures the velocity of a fluid with ultrasound to calculate volume flow.(1.)

The three types of Ultrasonic flow meters are:

  1. Transit-time (Transmission) - In-line (intrusive or wetted) and Clamp-on (non-intrusive)
  2. Doppler shift
  3. Open-channel 

An ultrasonic flow meter will measure the difference of the transit-time of the ultrasonic pulses that are generated with and against the flow direction. This time difference is a measurement for the average momentum of the fluid along the path of the ultrasonic beam. The average fluid velocity and speed of sound can be calculated by using the absolute transit times.

The ultrasonic industrial transit time flow meter will deliver high accuracy flow measurement for a wide array of liquids and pipe sizes. 


(1.) Ultrasonic flow Meter - Wikipedia  https://en.wikipedia.org/wiki/Ultrasonic_flow_meter