What level of accuracy can you expect from different types of meters and metering?

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%.