What is a common application for positive displacement flow meters?

Positive displacement flow meters are specifically designed to measure the flow of liquids by capturing a fixed amount of fluid in a chamber and then displacing it. This ability makes them particularly effective for accurately measuring low flow rates, where velocity measurements from other types of flow meters may not be as reliable.

Their design allows them to provide consistent and precise measurements regardless of the fluid’s viscosity or density changes. This is particularly valuable in applications where small volumes need to be quantified, as any inaccuracy can lead to significant errors in processes.

Other applications listed, such as measuring gas flows or analyzing chemical composition, are typically better suited for different types of meters. Monitoring pressure levels is also outside the primary functionality of positive displacement flow meters, which focus explicitly on flow measurement rather than pressure monitoring.