How does the Submerged Area Velocity (Sub AV) sensor calculate flow in a pipe?

Document ID

Document ID TE5998

Published Date

Published Date 27/05/2017
Question
How does the Submerged Area Velocity (Sub AV) sensor calculate flow in a pipe?
Summary
Submerged AV theory of operation.
Answer
The Submerged Area Velocity (Sub AV) sensor uses two principles to calculate the flow in a pipe:

1. A pressure transducer is used to calculate the level of water above the bottom of a known pipe diameter
2. A sonar signal and receiver face upstream and calculate the average velocity of the water.

By knowing the diameter of the pipe, level above the sensor and velocity of the water the sensor calculates the flow rate in the pipe.