For open channel flow metering, you can expect an error of approximately 8%.

For the different types of meters, you can expect the following accuracies:

  • Mechanical meters are usually the least accurate. With the latest technology, they can have an accuracy of 2%.
  • Electromagnetic meters have an accuracy between 0.5% and 2%.
  • Ultrasonic transit time meters have an accuracy between 0.5% and 1%.