Differential pressure flowmeters are a type of inferential flowmeter where the flowrate is calculated from a non-flow measurement. In this case various methods of obstructing flow are used to create a pressure drop across a section of pipe....
Mass flowmeters measure flow in one of two ways: inferentially or directly. Inferentially means density and flowrate are measured independently. Coriolis and thermal meters, shown below, are both direct mass flowmeters....
Most techniques used to meter flow in pipes are not applicable to flow in open channels. Special devices such as the Parshall flume are required. Parshall flumes are one of the most widely used flumes for permanent flow monitoring. They are...
Positive displacement flowmeters measure flowrate through the continuous filling and emptying of a chamber of known volume. Positive displacement flowmeters differ from positive displacement pumps only in that, rather than being driven by m...
Velocity flowmeters are popular because they give a direct measure of fluid velocity, the characteristic most commonly associated with flowrate. These flowmeters, however, are among the most sensitive to process conditions....
